In this paper the authors put forward the method of testing static and dynamic performance of Ng10 2/2CV and the influence of some kinds of fundamental parameters such as main value seat hole shape, spool with some kinds of structure, spool's itinerary, spool's coning, orifice diameter of control cover plate etc on static and dynamic performance of Ng10 2/2CV. The test has been performed, and the contrastive analysis for the test result has been made. Based on this, the best structure shape and structure parameters have been set up under the conditions in this paper.