In order to overcome the problem of short crosslinking time and adsorption loss of conventional profile control system，the composite emulsion crosslinking system with multiple structure was prepared by the way of two-step emulsion，using kerosine as oil phase，crosslinking agent solution as inner water phase，polymer solution as external water phase，with Span-80 and Tween-20 being lipophilic and hydrophilic emulsifiers，respectively. According to the requirements of profile control system with controllable crosslinking time，adjustable strength and low loss in field，the delayed crosslinking，viscosity increasing and adsorption performance of the composite emulsion crosslinking system were investigated. The results showed that，compared with the uncoated crosslinking system，the crosslinking time of the composite emulsion system could be extended more than one time，reaching up to 12—48 h；under the same polymer concentration and effective crosslinker concentration，the composite emulsion crosslinking system and the uncoated crosslinking system had similar viscosity，and the complex viscosity could reach 60—700mPa·s；after adsorption treatment，the uncoated crosslinking system lost more than 25% ，while the composite emulsion crosslinking system lost only 14.4%. The experimental results of core plugging rate showed that the plugging rate of the composite emulsion crosslinking system for about 5 μm2 permeability cores could reach up to 98%，which was higher than that of the uncoated crosslinking system. The composite emulsion crosslinking system with unique multiple structural features， had good sustained-release and protection，and it could provide an effective technical means for the well profile control task.