Large gantry band sawing machine

The utility model discloses a large-scale gantry band sawing machine, and aims to overcome the defects of low forging precision, poor stability and inconvenience in operation of a large-scale gantry band sawing machine in the prior art. In order to solve the technical problem, the technical scheme adopted by the utility model is as follows: the large gantry band sawing machine comprises a feeding guide rail and a feeding platform, and the feeding platform is connected to the feeding guide rail in a sliding manner; limiting blocks are symmetrically arranged on the feeding platform; two vertical guide rails are arranged on the two sides of the gantry support respectively, sliding blocks matched with the vertical guide rails are arranged on the saw frame, hydraulic cylinders pushing the saw frame to move are arranged on the two sides of the gantry support respectively, and the hydraulic cylinders are arranged between the two vertical guide rails; and the clamping device comprises a hydraulic device and a movable