Protection device of controller

The invention discloses a protection device of a controller. The protection device comprises a machine body, a storage table is arranged at the bottom of the machine body, and a first supporting rod is arranged on one side of the bottom of the storage table. A sliding block is arranged at the bottom end of the first supporting rod. A protruding block is arranged at the bottom of the sliding block.The protruding block is arranged in a sliding groove matched with the protruding block. The sliding groove is formed in the top of the inclined plate. A second supporting rod is arranged at the bottom of the inclined plate, a U-shaped frame is arranged at the bottom end of the second supporting rod, a first connecting rod is arranged on one side of the middle of the second supporting rod, the end, away from the second supporting rod, of the first connecting rod is sleeved with a first sleeve matched with the first connecting rod, a third supporting rod is arranged at the top of the first sleeve, and a second connecti