目的　了解四川省凉山彝族自治区静脉吸毒人群直接和间接共用注射器具吸毒的行为学特征。方法　通过访谈和填写调查表 ,对 379名静脉吸毒人员的社会人口学情况、近 3个月内静脉吸毒共用注射器具吸毒方式、性行为等有关的行为学特征进行了调查。结果　近 3个月内 ,4 3.8% (16 6人 )的参加者与他人共用过注射器具 (直接或间接共用 ) ;4 1.2 % (15 6人 )的参加者与他人有过直接共用注射器具行为 ;33.3% (12 6人 )的参加者与他人有过间接共用注射器具行为。直接共用注射器具的多因素logistic回归模型分析中 ,有统计学意义的人口学变量是汉族。间接共用注射器具的多因素logistic回归模型分析中 ,有统计学意义的变量为较低的文化程度和住自己的房子或租房。近 6个月有新性伴的为 115人 (30 .3% ) ,近 1个月与非主要性伴进行异性性交每次都使用安全套的占 14 .6 % (13/ 89)。结论　静脉吸毒人群中间接共用注射器具静脉吸毒行为、高危性行为普遍 ,在进行健康教育时 ,应加强对此类行为的干预 Objective To understand the behavioral characteristics of injecting drug directly and indirectly in injecting drug users in the population of intravenous drug users in Liangshan Yi Autonomous Region, Sichuan Province. Methods Through interviews and questionnaires, we conducted a survey on the socio-demographic characteristics of 379 intravenous drug addicts and the behavior of drug-sharing devices such as drug-sharing devices in the past three months. RESULTS: In the past 3 months, 43.8% (16 6) of the participants shared the injection device (directly or indirectly) with others; 4 1.2% (15 6) of the participants had direct sharing with others Behavior; 33.3% (12 6) participants had indirect sharing with other people’s injecting apparatus. In the multivariate logistic regression model analysis of direct sharing injection equipment, the demographic variables with statistical significance were Han nationality. In the indirect multivariate logistic regression model analysis of injecting devices, statistically significant variables were lower educational level and lived in their own houses or rented houses. 115 (30.3%) had new partners in the past 6 months, and 14.6% (13/89) used condoms each time they had heterosexual intercourse with non-major partners in the past month. Conclusion Intravenous drug users indirectly share intravenous drug use behavior, and high-risk sexual behaviors are common. When conducting health education, the intervention should be strengthened