There are many kinds of techniques to diagnose cervical lesions, but TCT is one of the newest and most accurate techniques at home and abroad to replace the traditional cervical smear for detecting cervical lesions.TCT can find the cells of early lesions, and it is more objective and accurate than the conventional Pap smear with no human error, and it can realize the real early diagnosis (the diagnosis rate is up to more than 90%). Reasons for false-negative in conventional Pap smear 1, no diagnostic cells in the smear or poor quality of the smear, excessive mucus, blood or inflammatory cells and excessive overlap of epithelial cells so that the abnormal cells are covered; 2, heavy workload of reading the film, eye fatigue, resulting in microscopic leakage of the screening; 3, errors in understanding and judgment, false-positive and false-negative cases are inevitable. Special brush, with the advantages of simultaneous access to the cervix and cervical canal cells, sampling comprehensive and satisfactory; specimens removed immediately washed into the cell preservation solution, to avoid the routine Pap smear process left on the sampling device cells with the sampling device together with the abandonment and excessive drying of cells. The entry into the preservation solution is programmed and the sample is then taken to make a homogeneous thin layer smear. The structure and background of the cells in the thin layer are clear for differential diagnosis. In particular, columnar cells, which are difficult to see with a normal smear, can be clearly seen. Therefore, TCT is significantly better than traditional cervical smear. Cervical cancer is a major killer that jeopardizes women’s health, and regular medical checkups can help us stay away from its threat. Women should take better care of themselves and have regular medical checkups to be healthy and energetic women in the new era.