This Paper describes the epidemiological situation of STDs at home and abroad, the relationship between STDs and travel and the impact of STDs on international tarval. It also analyses STD’s causative factors and raises preventive measures for STDs. This Paper describes the epidemiological situation of STDs at home and abroad, the relationship between STDs and travel and the impact of STDs on international tarval. It also analyzes STD’s causative factors and raises preventive measures for STDs.