In the sampling design project of ore processing performance test of copper polymetallic ore in the middle reaches of Laling Zaohuo, according to the division of component interval, frequency and frequency statistics of mineralization zone in mining area, the designed sampling points and grades are selected in low, medium and high schools, and the proportion of sampling points basically conforms to the frequency distribution. Considering the representativeness of the main components Cu, Mo and Au, 19 sampling points were arranged, of which 17 were taken in the borehole core during the general survey and detailed investigation, and 2 were taken in the mining pit CK1. The sampling points are distributed in different exploration lines and different depth positions, which can well meet the representativeness of spatial distribution of ore samples. Compared with the average grade of mineralized zone, the average grade of Cu and Mo decreased by 8.86% and 6.46% respectively. According to experience, the permissible relative error of general nonferrous metal deposits is-15% ~ +15%, and the effect of-15% ~ 0 is the best. Both Cu and Mo are within the optimum range of sample grade fluctuation. After the sampling design was implemented, representative test samples were provided for the ore processing performance test of copper polymetallic ore in the middle reaches of Laling Zaohuo, which met the test needs.