Building material cutting device for civil engineering

The utility model relates to the technical field of cutting devices, and discloses a building material cutting device for civil engineering, which comprises a workbench, two sides of the top of the workbench are fixedly connected with a fixing frame, the top of the fixing frame is provided with an adjusting mechanism, and the middle of the upper part of the workbench is provided with a fixing mechanism. The adjusting mechanism comprises an adjusting plate, a fixing groove is formed in the bottom of the adjusting plate, and a screw is arranged in an inner cavity of the fixing groove. After a plate is fixed through the fixing mechanism, through cooperation of a first motor, a supporting frame, a movable block and an annular sliding groove, the fixing mechanism is conveniently driven to rotate, meanwhile, the plate is driven to rotate, the angle of the plate during cutting is conveniently adjusted, and through cooperation of a first hydraulic rod, an adjusting plate, a second motor, a screw rod, an adjusting blo