血痕是法医物证中最为常见的检材，一般的血痕用常规的解离方法可以得出准确的结果。但在实践工作中，提取到的不少血痕都已受到不同程度的污染，其中一些本身含有血型物质的体液污染物（如精斑、唾液斑、阴道斑、汗斑等）会影响血痕检验的结果。本文利用氯仿甲醇混合液抽提处 Bloodstains are the most common samples of forensic evidence, and general bloodstains can be accurately resolved using conventional methods of dissociation. However, in practical work, many bloodstains extracted have been polluted to varying degrees. Some of the body fluid contaminants (such as semen, saliva spots, vaginal plaques, sweat spots, etc.) that contain blood group substances can affect the result of bloodstain test . In this paper, chloroform methanol mixture extraction