Oil storage tank sling floating disc device

The utility model discloses an oil storage tank sling floating disc device which comprises a tank body and a floating disc. The floating disc is movably arranged in the tank body, a floating disc framework of a polygonal structure is arranged on the floating disc, a sling is connected to the joint of the floating disc framework, and a plurality of supporting legs rotationally connected with the floating disc are uniformly arranged below the floating disc; a lifting device is arranged on the tank body, a guide device matched with the sling is arranged at the top in the tank body, and the sling penetrates through the guide device and the tank body to be connected with the lifting device. The framework connected with the slings is additionally arranged on the floating disc in the tank, and the slings are arranged in a reversing manner, so that the stress uniformity of the floating disc is ensured, and the floating disc can be prevented from touching obstacles in the tank during lifting; the lifting operation of