TCT is an abbreviation, the term is called cervical fluid-based thin-layer cytology examination, which is a cervical cancer screening and significantly improves the immunity of specimen and the detection rate of abnormal cervical cytology compared with traditional cervical smear and Pap smear examination. the detection rate of TCT for cervical cancer prevention examination is about 90%, which can detect precancerous lesions in advance, and also detect trichomonas, mycobacteria and fungal detection. Therefore, TCT technology is an important technical tool applied to gynecological pre-cancer screening. tCT examination is to rotate a special small brush along the cervical opening to 5-6 circles, put the removed cervical cells in the preservation solution to save them, and then send them to the laboratory for pathological testing. In conclusion, TCT is the first gateway to cervical cancer screening for women. If TCT finds problems, further HPV testing, colposcopy testing and cervical biopsy can be done, which can improve the screening rate of cervical cancer. In conclusion women of childbearing age should have TCT once a year.