Chain type multifunctional wrench

The invention discloses a chain type multifunctional wrench which comprises a main body, a supporting cylinder, a limiting plate, a threaded cylinder, a left hook, a jacking screw rod, a supporting groove, a lower butterfly nut and a fastening part. The supporting cylinder is fixed to the front end of the bottom of the main body, the limiting plate is fixed to the middle of the main body, the threaded cylinder is fixed to the upper portion of the main body, and the left hook is fixed to the left end of the top of the main body. The jacking screw rod is in threaded connection with the interior of the main body, and a supporting groove penetrates through the upper portion of the jacking screw rod. Through assistance of a chain and a puller bolt, hexagon bolts and hexagon nuts of different sizes can be well clamped, the area contact with the hexagon bolts and the hexagon nuts can be increased by manually rotating the lower butterfly nut, and therefore the clamping effect can be better improved. Then the hexagon