Tumor is like a greedy monster, not only ruthlessly eroding the adult body, has quietly extended its tentacles to children. When people still think that malignant tumors are the “privilege” of adults, the morbidity and mortality of children’s malignant tumors have been increasing rapidly for decades, and malignant tumors have been creeping up to be the top three factors of children’s illnesses and deaths! Children’s tumors can be divided into benign tumors and malignant tumors, this article we focus on the analysis of malignant tumors. Malignant tumors in children can be broadly divided into solid tumors and non-solid tumors. Non-solid tumors are also called hematologic tumors, and clinically common ones are mainly leukemia, lymphoma, etc. Among them, leukemia is the disease with the highest incidence rate among malignant tumors in children, basically accounting for about 30%. Solid tumors have a slightly lower incidence rate than non-solid tumors in children’s malignant tumors, and clinically common neuroblastoma, germ cell tumors and so on. With the continuous development of scientific research, medical scientists have found that there are various factors that may be associated with the high incidence of malignant tumors in children. First of all, the rapid deterioration of the natural environment, which does not match with the rapid economic development, is found to be perhaps one of the most dangerous triggering factors for childhood malignant tumors. House renovation has gradually become a concern in recent years. Due to the massive application of poorly made renovation materials, various toxic substances accumulate in the air, such as benzene and formaldehyde. If the renovated house is not thoroughly ventilated and cleaned for a sufficient period of time, there will be a large amount of toxic gases remaining in the house, and if you move in at this time, the harmful gases will quickly invade the human body through the respiratory tract or skin mucous membranes and other channels, resulting in serious damage. Especially young children, the body’s tissues and organs are still developing, the immune system is not perfect, can not effectively resist or remove the toxic substances into the body, which may lay the root of the problem, triggering malignant tumors. Eliminate this factor we also need to start from the root, reduce the application of a large number of decorative materials, the quality of decorative materials to carry out strict control; and in the renovation of the perfect removal of toxic substances in the work, such as a longer period of time to maintain air circulation; in the move in before the professional testers can be asked to measure the indoor gases, to be safe to move in after the safety. Parents’ work environment has also been proven to be one of the risk factors associated with the development of malignant tumors in children. Some clinical observation studies have found that parents’ long-term exposure to chemical reagents may have a certain impact on the children’s malignant tumors, and these job categories can be found in chemistry teachers, experimental researchers, industrial material handlers, and so on. Of course, there is also the problem of ionizing radiation, which has now been taken seriously. Some of the children’s parents need to face the computer and other ionizing radiation equipment for a long time, due to the accelerated pace of work and increased pressure, and even some pregnant women have to sit in front of the computer for a long time to do their work, which have been proved to have a certain degree of correlation with the children’s malignant tumors. Although this factor can not be completely eliminated, but if you try to pay attention in life and work, you can still reduce the occurrence of this risk factor. For example, pregnant women to minimize exposure to the computer, television time, as far as possible during pregnancy to wear radiation protective clothing; engaged in chemical-related work parents at work in strict accordance with the provisions of the isolation clothing, chemical reagents related to the operation before and after the thorough cleaning of contact areas (such as hands) and so on. Second-hand smoke is currently one of the most important factors affecting children’s health. According to statistics, almost half of the world’s children are breathing air polluted by tobacco. Second-hand smoke in the nicotine, cyanide and other toxic substances, although lower than the concentration of direct inhalation of tobacco, but because children are still in the stage of growth and development, the immune function is not yet perfect, long-term inhalation of these harmful substances on their physical health caused great harm. Chinese medicine believes that the lungs as a delicate organ, is the body’s most vulnerable to external evil organs, second-hand smoke is like the evil poison, long-term damage to children’s lungs. The impact of second-hand smoke on children’s health is far beyond our imagination, therefore: eliminate second-hand smoke, from you and me to start! Finally, there is the obesity that has to be said! Economic development, life is rich, the table is full, even the children look “rich”! KFC, McDonald’s and other fast food has become the children’s favorite food, including French fries and other fried foods, as well as Coke, Sprite and other carbonated beverages, although tasty, but also contains a huge amount of calories, in promoting the conversion of energy into fat and increase body weight at the same time and can not provide the body with all kinds of vitamins needed for growth, trace elements. Not only lead to the rapid increase in the rate of obesity in young people, the incidence of related diseases is also correspondingly high, including children’s malignant tumors! Therefore, to improve dietary habits, adjust the dietary structure, as early as possible to develop a good habit of eating on time, not picky eaters, not partiality for children’s healthy growth and development is extremely important. Through the analysis of the above factors, I believe that we have a clear understanding of what aspects of life is the high incidence of childhood malignant tumors, let us work together to prevent tumors from children to start!