The reasons of precipitation formation after mixing alkyl salicylates ( T109) and alkyl benzene sulfonates ( T106) were discussed. The structure schematic formula as well as colloidal and micellar shape of different base number alkyl salicylates and alkyl benzene sulfonates were given. 探讨了烷基水杨酸钙(T109)与烷基苯磺酸钙(T106)混兑产生共沉淀的原因,提出不同碱值烷基水杨酸钙和烷基苯磺酸钙的结构示意式和胶体胶束形态。