Abstract: In order to study the strength of the mine roadway surrounding rock under different support restraint condition and to study the mechanics features of the surrounding rock when a mine pressure bumping occurred, the rock triaxial pressure-strain curve after peak could be obtained with the test method and the electrohydr aulic servo controlled triaxial pressure machine could be the best advanced equipment with the full curve drawing.The new research and developed TAW-3000 electrohy draulic servo rock triaxial test machine was equipped with the advanced control technology of the test machine at home and abroad and was improved in the structure a nd functions.A door type integrated frame with a rigidity over 5 GN/m, a self balanced pressure room, EDC full digital servo measurement and controller, a pore water s ystem of the mechanic and hydraulic combined mechanism, a specimen high temperature, and the expansion interface of the acoustic emission and other equipments w ere designed.With the axial force of 3 000 kN, the surrounding pressure of 100 MPa, the permeable water pressure of 60 MPa and other technical index provided and w ith the confirmation of the uniaxial compression of the coal and gas, triaxial compression, unloading test and others, the function of the test machine is advancing and t he performances are excellent.