Chain tong specially used for production of polytetrafluoroethylene membrane

The utility model discloses a chain tong specially used for production of a polytetrafluoroethylene membrane, comprising a chain tong body, a tong handle, a crank, an upper jaw and a chopping block, wherein the tong handle and the crank are respectively fixedly connected with the upper part of the chain tong body by virtue of a spindle, the chain handle is connected with the upper jaw in a transmission manner by virtue of the crank, the upper jaw is arranged just above the chopping block and can be close to or far away from the chopping block along the vertical direction while the tong handle rotates, and the chopping block is fixedly connected with the chain tong body. Preferably, an elastic resetting element used for driving the tong handle to return to the initial position is also arranged between the tong handle and the crank, the elastic resetting element comprises a cylindrical spring arranged in a blind hole at the lower end of the tong handle, and the two ends of the cylindrical spring are respectivel