The utility model relates to a linkage safety device of a large-tonnage climbing crane. The linkage safety device is characterized in that the device comprises an external safety pin disk, a safety pin shaft, a safety pin shaft bearing, a safety pin cylinder, a drum of a hoist and a solenoid valve, wherein the safety pin shaft bearing is used for fixing the safety pin cylinder and the safety pin shaft; the safety pin shaft bearing is welded with the pedestal of a hoist; the safety pin shaft is pin-connected with the safety pin cylinder through a spring return; the external safety pin disk is connected with the drum of the hoist; and a solenoid controlled relief valve is connected with the motor of an oil pump. The linkage safety device can enhance the safety coefficient of operators and machines by mounting a brake apparatus with relatively simple electromechanical and structure principle on a walking hoist (traction apparatus) of the prior climbing crane. In addition, the linkage safety device has the advantages of simple operation, straight-forward structure, less investment and low cost.