Abstract: Aiming at two problems of measuring low coal level and(preventing) blockage of a temporary coal bunker of coal mine,the paper introduced a design of equipment of measuring low coal level and(preventing) blockage,which used hydraulic way to measure and control,and introduced installation,(structure) and working principle of the equipment in details.The actual application showed that the device had simple operation,stable running and reliable performance,and could resolve the problems of low coal level and blockage in a temporary coal bunker effectively with high application value.