Objective   To investigate the occurrence of sexual behav ior with non-spouse among repro ductive age men and women.

  Methods   Population Proportional to Size sampling method was employ ed in sampling.The sampled women and men were interviewed face to face with uniform questionnaire dur ing the period of time from November 2005 to December 2005.

  Results   More than 90% interviewed men and women agreed that one person should restrict sex ual relationships to a single sexual partner, and about 1/3 interviewed men and women agreed with that was because of afraid of STI/HIV/AIDS.The pro portion of unmarr ied men who had already have sex ex perience was 20.2%, and 47.8% had used no contr aception during their first sex, 42.2% used condom.The proportion of unmarried women who had already have sex ex perience was 8.7%, and 30.4% had used no contraception during first sex, 43.5% used condom.The proportion of having non-regular sexual partner was 1.6% among married men, 0.5% among married women, 25.6% among un-married men with sex behavior and 4.3% among un-married women with sex behavior, and many of them did not use condom during intercourse.

  Conclusion   Although most people agreed that one person should restrict sexual relationships to a single sexual partner, sexual behavior with non-spouse had happened, and condom use was still not satisfactory.Efforts should be put both on moral education and condom use to ensure safe sex.