Clamping mechanism for cleaning slips

The invention discloses a clamping mechanism for cleaning slips. The clamping mechanism comprises a bottom plate. A propulsion assembly is arranged at one end of the upper surface of the bottom plate.A back-off assembly is arranged at the other end of the upper surface of the bottom plate. The propulsion assembly comprises a supporting plate, a propulsion rod, an extending rod and a clamp I. Thebottom face of the supporting plate is connected with the bottom plate. One end of the propulsion rod penetrates through the end, away from the bottom plate, of the supporting plate, and then is connected with one end of the extending rod. The other end of the extending rod is connected with the clamp I. The propulsion rod is in threaded connection with the supporting plate. The back-off assemblycomprises a supporting block, a back-off rod, an extending arm and a clamp II. A mounting hole is formed in the end, close to the propulsion assembly, of the supporting block. One end of the back-offrod is inserted into the mou