Abstract: An asynchronous crosslinking system for deep profile control using organic chrome crosslinking agent and phenolic resin crosslinking system was developed . The following formula was screened out as the optimum system:5000mg/L HPAM+0.02%organic chrome +0.2%phenolic resin. The experiment results show that the first crosslinking time of the system is about30h, and the second crosslinking time is about 90h; the first crosslinking strength is0.02MPa, and the second crosslinking strength is0.062MPa. The influencing factor of the gelling properties of the system, including temperature, salinity and pH were investigated. The character of the system is that the total dosage of the crosslinking agent is low, and the cost is low; the viscosity of the system can increase quickly in short term through the first crosslinking, which inhibit the leakage of the gel and its infiltration into low permeable layers; the strength of the gel can be enhanced greatly through the second crosslinking. The system can be applied to the the strong heterogeneous formation with large pores or developed fractures