The prevention of syphilis is generally to isolate the source of infection, cut off the means of transmission, strengthen the premarital and prenatal examination, etc., as follows: 1, isolation of the source of infection: syphilis patients are the main source of syphilis, early detection, early cure is the fundamental way to eliminate the source of infection, to avoid sexual intercourse during the period of treatment. 2, to cut off the means of transmission: syphilis is mainly transmitted through sexual intercourse, so there should be a good view of sexual morality, to keep a single fixed Therefore, you should have good sexual morality, keep a single fixed sexual partner, do not have sexual relations with infected people, adopt protective sexual behavior, use condoms safely and scientifically, develop good hygiene habits, do not take a bath in public baths without hygiene protection, and do not share toothbrushes, razors, cutlery, etc. 3, strengthen the pre-marital and prenatal checkups: you should protect the second generation, i.e., strengthen the pre-marital and prenatal checkups, to prevent the occurrence of foetal transmission of syphilis, and pregnant women infected with syphilis can transmit syphilis to their children through the placenta. Infected pregnant women can transmit syphilis to the fetus through the placenta, and can also infect the newborn through the birth canal.