Due to the lack of full consideration in the planning,the trouble with the sand feeding system for the filling plant originally designed for the northern ore belt in Wushan Copper Mine occurred frequently and had serious influence on mining production.An analysis in more detail of the trouble with the sand feeding system was made.Based on this analysis,the renovation project on the employment of belt conveyor sand feeding system was proposed.Through the technical reform of sand feeding system,a better result has been obtained and the requirement of mining production has been satisfied.