Sand cleaning device for cable protection pipe and using method

The invention discloses a gravel cleaning device for a cable protection pipe and a using method, and relates to the technical field of cable protection pipe overhaul and maintenance. The gravel cleaning device for the cable protection pipe comprises a force bearing rod, a filter body and a cover body, a plurality of buckling grooves matched with the circles of the filter bodies are formed in the force bearing rod; the plurality of filtering bodies are arranged from top to bottom and are respectively connected with the force bearing rod through the buckling grooves; a first tenon matched with the mortise in the filter body is arranged on the cover body; the mortise and the first tenon are clamped to form a mortise and tenon structure; the filter body is connected with the cover body through a mortise and tenon structure. The technical problem that the inner wall of the cable protection pipe is easy to damage in the cable dragging process in the prior art is solved. The gravel filtering part of the device is co