As little as three parts per million grams of residual pesticides can cause brain development disorders in children before the age of seven. Organochlorine pesticides mainly act on the organs is the brain as the core of the nervous system, resulting in abnormal brain and intellectual development, showing slow reaction, mental retardation, dull expression and other disorders. Organophosphorus pesticides prevent the transmission of nerve signals, resulting in neurological dysfunction, poisoned children show hyperactivity, difficulty concentrating, IQ is generally 70-90, verbal IQ and cognitive impairment of graphics, left and right discrimination difficulties. Experiments have found that when organochlorine pesticides are added to human cells at a concentration of three parts per million per kilogram of body weight, the synthesis of proteins that promote brain development stops almost completely and the brain cannot develop. Pesticide residues can harm the growth and development of children before the age of 16. Environmental hormones (also known as exogenous endocrine-disrupting chemicals) are recognized worldwide as the main culprits of abnormal human and biological growth and development. Among the 70 environmental hormones identified by international organizations, pesticides are 40, accounting for about 60% of the total number of environmental hormones. The serious harm of pesticide residues on the growth and development of children is manifested in three aspects: First, it leads to abnormal development of height and body shape. Generally speaking, boys start to accelerate growth from about 12 weeks, 14-15 years old is the fastest stage of height growth, slow down after 16 years old, 18-20 years old is not growing, girls’ growth spurt time to two years earlier boys. So before the age of 16 is the best period of growth and development of children. Human growth and development is mainly regulated by growth hormone and growth factors. Pesticide residues can lead to pituitary insufficiency and abnormal secretion of growth hormone, when the hormone secretion is too little, the height will grow slowly, the shape will become thin and small, when the hormone secretion is too much, it will appear gigantism. In Taiwan, it was found that children affected by organochlorine pesticides had an average weight of 500 grams less at birth and were on average 3.1 cm shorter than uncontaminated children around the age of 10. A child should grow an average of 5 cm per year between the ages of 3 and 9, and if it falls below this rate it is a sign of getting shorter. Another hazard of abnormal growth is to cause abnormal obesity in children, which is the result of residual pesticides causing excess secretion of growth hormone. The second is to cause premature sexual maturity in children. The first menstruation of girls in China has been advanced from an average of about 14 years old 20 years ago to about 10 years old now. Four-year-old girls’ breasts are almost fully mature, and 5-year-olds have menstruation, a phenomenon seen in many children’s hospitals across the country every day. Precocious puberty leads to early body growth, but more than half of them end up less than 150 cm tall. Third, it causes serious illnesses and diseases. Research by scientists has shown that when preschool children are exposed to more than eight pesticides may cause cancer. The commonly used color enhancer in apples than owes, will make apples bright and plump, but it is a strong carcinogenic agent, the risk of cancer is one in a thousand. Currently commonly used organophosphorus pesticides block the transmission of nerve signals, so that some of the nervous system governed by the heart, bronchial tubes, gastrointestinal and other functional abnormalities. Long-term exposure to organophosphorus pesticides damages the visual function of children, showing symptoms such as myopia and edema. Medical research confirms that almost all pesticides can cause damage to a child’s immune system and low resistance to disease.