In view of precision feeding machine developed by Shanghai Ocean University, with CFX simulation analysis, combined with single factor experiments and orthogonal experiments, the influence of measurement accuracy of the feeder feeding tube cone angle, length and feed tube in tube access port velocity is studied. The single factor test found that the feed mass flow that is measured by the weight device is determined by the dip angle α of the feeding tube, the tube length L and the feed speed v₀ at the access port of the feeding tube; the best parameter of accurate feeder feeding machine based on the design of orthogonal test should be as followed. The feeding tube dig angle is 38°. The length is 410 mm. The tube access port velocity is 0.32 m/s. The best measurement accuracy under these parameters is got; the primary and secondary order of measurement accuracy is obtained by range analysis. The feed speedat the tube access port is the main factor affected the accuracy of measurement, and dip angle is the second, tube length is last.