The utility model discloses a perforation completion pipe string secondary pressure release circulating device, the oil pipe who is applicable to the lower well of formation pressure coefficient carries perforated string, realizes that the slow of the detonating ware of pressure rises to press the perforation under can satisfying a pressure release circumstances, can form big circulation canal after guaranteeing the secondary pressure release simultaneously to satisfy and wash kill -job construction requirements. This circulating device is equipped with striker bolt nail and weighted lever baffle at this internal top -down, is equipped with liquid flow hole on the weighted lever baffle, striker bolt nail is equipped with the pressure release hole in the pin body of rod in packing into from the pipe wall of body and stretching into the lumen, and the pressure release hole is the reducing hole. Utilize the utility model discloses can satisfy the circulation of the lower stratum oil pipe of pressure coefficient transport perforated hole and wash the kill -job technological requirement, eliminate well control hidden danger, can protect the oil reservoir better, shorten the engineering time, reduction in production cost can produce better economic benefits and social, has fine result of use.