Laboratory tests for leukorrhea routine, HPV test and TCT test are required before the injection of cervical cancer vaccine. 1. HPV infection, also known as human papillomavirus infection, is currently the main factor inducing cervical cancer. Before vaccination, a comprehensive examination is required to check for the presence of cervical lesions and the presence of high risk factors for cervical cancer. Usually, a routine test is needed, which can check whether there is any infection such as bacterial, miscellaneous bacteria, pH value, cleanliness and so on. 2. HPV test is also known as HPV subtype virus infection test, which can effectively check the specific type of HPV infection. If the test is positive, it means that there is HPV infection, and you need to turn negative before you can take the cervical cancer vaccine. For example, if the cervix is positive for HPV 16 or 18, the bivalent vaccine cannot be given. If you are already infected, there is no point in taking the vaccine again, so you can choose to take the nine-valent vaccine or not to take the vaccine at this time. 3. TCT is a cervicovaginal cytologic smear test, which can detect abnormal cells in the cervix and find some pre-cancerous lesions of the cervix. If this test is abnormal, it is positive for cervical cancer, and cervical biopsy is recommended, and cervical cancer vaccine cannot be injected.