The invention relates to the technical field of stretching dies, and discloses an oil cooler accessory stretching die structure which comprises a punching machine, a mounting block is fixedly connected to the bottom of the punching machine, a mounting groove is formed in the bottom of the mounting block, a clamping block is inserted into the mounting groove, and screws are in threaded connection with the interior of the mounting groove and the interior of the clamping block. A die body is fixedly connected to the bottom of the clamping block, and mounting mechanisms are arranged at the top of the die body and the bottom of the punching machine. According to the oil cooler accessory drawing die structure and the production process thereof, through the arrangement of the mounting mechanism, when the die body needs to be mounted, only an extrusion ball needs to extrude a limiting block, so that the limiting block is clamped into a bayonet, and then a clamping block is limited through a screw, so that the die body can be mounted; and when an operator replaces different mold bodies, no excessive time is consumed, and then the production efficiency is improved to a certain degree.