The working oil pressure of super high pressure manual hydraulic pressure pump reaches 300 MPa. In this pump, one of oil tube has large length,small diameter and thin wall. The seal of this tube with link parts is entirely depended on good contact and compress of protruding sphere of oil tube at two ends and concave sphere of link parts, so requirements on size and shape precision of protruding sphere of oil tube at two ends are very high. The amount of compression of tube blank should be accurately controlled at cold extrusion, but the stroke of press cant be controlled and not adjusted. Using the advantages of extrusion die and fixture, all problems were well solved when high pressure oil tube ball heads at two ends and antitapered surface were extruded coldly.