Multi-specification building material fixing support

The utility model discloses a multi-specification type building material fixing support which comprises a sliding frame and a hydraulic cylinder, one end of the sliding frame is provided with a limiting mechanism, the limiting mechanism comprises a mounting plate fixedly arranged at one end of the sliding frame, and the other end of the mounting plate is fixedly provided with a gear plate. A linkage gear is arranged at the other end of the gear plate in a meshed mode, a connecting frame is movably arranged on the inner side of the linkage gear, a movable shaft is fixedly arranged in the linkage gear, a telescopic rod is fixedly arranged at the lower end of the gear plate, a spring is movably arranged on the outer side of the telescopic rod, and a limiting head is fixedly arranged at the lower end of the telescopic rod. According to the multi-specification type building material fixing support, under the action of meshing connection between the linkage gears and the gear plates, the two sets of gear plates can