Abstract: ObjectiveTo investigate the usage rate of condom in prostitution and tuck driver along highway in different times and places,and analysis the cause of this situation and the correlation with STD/AIDS.MethodsTo select the prostitution and long-distance truck drivers in correlate places along No.105 highway.To investigate their difficult-easy degree obtaining condom,and usage rate of condom in the time of latest sexual behavior before and after intervention,and make correlated analyses with the prevalence rate of STD/AIDS in last one year.ResultsCondom could be obtaineed easier in suburban area where colligation scores of driver group and female group were 6.7 and 7.4 respectively.But condom could be obtaineded more difficultly in remote area where colligation score of two groups were 6.5 and 3.6 respectively.One month before and after intervention,the usage rates of condom of high risk female were 39.4% and 52.5%,and of truck driver were 38.2% and 57.3% respectively.The difference before and after intervention is much obvious(χ²=12.68,P<0.01).Half year after intervention,usage rates of condom of female group and driver group were reduced to 43.9% and 46.9% respectively,which comparing with that before intervention had not obvious diffence(χ²=2.08,P>0.05).In last one year,prevalence rates of STDs in female group and driver group were 34.38% and 28.75% respectively.The diseases included mainly non-gonococcal urethritis,syphilis and gonorrhea.The correlation of STDs prevalence rate was obvious(r=0.992,P<0.01).Conclusion(1)Condom was obtaineded difficultly in remote area along highway so that usage rate of it was low and prevalence rate of STDs was high relatively in female group.The chance of obtaining condom was more in driver group than in high risk female group.(2)Health education intervention can improve usage rate of condom in short period buthas not obvious effect in long time.(3)The high prevalence rate of STDs in high risk crowd along highway is connection with lower usage rate of condom.