Abstract: There always forms large stuck blocks or the arch-shaped bridging caused by the wet small pieces and powder materials in the top feeder of grizzly screen and the grizzly screen of underground slide for various types of crushers in each open mine of our country，which  seriously affected the material flow.The newly-developed clearer can break the bulky materials，and clean the arch-shaped powders.And this device adopts the hydraulic transmission and hydraulic shock crushing.Such three ways as wireless remote control，electronic control and manual systems can be quickly shifted，and some tools including hydraulic hammers，hydraulic pliers，hydraulic bucket，grab and digging buckets can be mounted in the operation so as to realize crushing，clamping，shoveling，grabbing，digging，hooking，picking and other functions.

Key words: Crushing, Crusher cleaner, Wireless remote control, Load feedback.