The utility model belongs to the technical field of irradiation crosslinking equipment. The utility model relates to an irradiation crosslinking device, in particular to an LED irradiation crosslinking device. Including a housing, an LED ultraviolet lamp is fixedly mounted on the inner wall of the top of the shell; an air inlet hole is formed in the inner wall of one side of the shell; a mountingblock is fixedly mounted on one side of the shell; a cavity is formed in the mounting block; a water pipe is fixedly mounted in the cavity; the top end and the bottom end of the water pipe extend outof the cavity; a water pump is fixedly installed at the top of the shell, a water outlet pipe of the water pump is communicated with a water pipe, a water collecting tank is fixedly installed on one side of the shell and located below the installation block, the water pipe is communicated with the water collecting tank, a water inlet pipe of the water pump is communicated with the water collectingtank, and an air inlet is formed in one side of the cavity. The cross-linking device is simple to operate, high in practicability, capable of rapidly dissipating heat in the shell, good in heat dissipation effect and capable of improving the cross-linking efficiency and quality.