Assembly type cable support

The utility model relates to an assembly type cable support which is characterized in that a motor rotates to drive a lead screw sliding table to vertically move upwards, the lead screw sliding table is fixedly connected with a sliding block lifting system, a back plate of the sliding block lifting system is vertically connected with the top of a lifting sliding table in a sliding mode through a linear guide rail, and the sliding block lifting system comprises a plurality of box type sliding blocks. The box-type sliding block is in sliding connection with a vertically-fixed optical shaft, synchronous wheels are installed at the upper end and the lower end of a sliding block lifting system back plate, the upper portion of a second synchronous belt meshed with the synchronous wheels is fixedly connected with a second synchronous belt forward fixing rod, and the second synchronous belt fixing rod is fixedly connected with a second synchronous belt fixing rod forward fixing piece. A forward fixing part of a secon