Adjustable linear module

The utility model discloses an adjustable linear module which comprises a guide rail outer frame, a lead screw is rotatably installed in the guide rail outer frame, a hollow sliding block is installed on the guide rail outer frame in a sliding mode, a cavity is formed in the inner wall of the sliding block, a threaded rod is installed on one side of the sliding block in a threaded mode, and a threaded rod is installed on the other side of the sliding block in a threaded mode. And four sets of screw rods are symmetrically arranged in pairs, a U-shaped frame is rotationally installed at the end, located in the cavity, of each screw rod, a sliding block bearing is rotationally installed in each U-shaped frame, and a bearing groove is formed in the outer wall of the guide rail outer frame. When in use, the sliding block bearing can be driven to move by rotating the screw rod, and when the sliding block bearing is subjected to certain abrasion, the friction force between the sliding block and the linear guide rail