The test process and data analysis has a important influence to similar material on the indoor model tests.On the basis of previous research of bedrock similar material，the weight ratio of barite powder plus sand to gypsum powder，the weight ratio of barite powder to sand，the weight ratio of water to gypsum powder are selected as three kinds of combination，and each combination set three levels，a total of nine groups of material proportioning is designed by the orthogonal design method，by optimizing the matching we finally get the recommended value of the excellent performance of the model material ratio which can be used in rock-socketed pile model test.The tests results show that when similar material density meets the requirements，using ordinary plastering gypsum as cementitious materials，the variable range of compressive strength and elastic modulus of the material is small and can’t meet the needs for rock similar material in different physical model test;using the alpha high-strength gypsum powder instead of the ordinary plastering gypsum powder can improve the material strength and elasticity modulus of the material and it makes the similar material which made by barite powder，sand，plaster and glycerin can simulate most of the basic characteristics of rock materials.