Abstract: This paper Presents the elastic contacting analysis on the combined frame of large die forging hydraulic press by means of the finite element-mixed method and a special computer program and the contacting force and its distribution are evaluated. At the same time, by using SAP-5 Structure analysis program as three-dimensional problem, analyzed and calculated are the effects of the working load and nonuniform distribution of pre-stressed force on the integral working property of the combined frame. The pre-stress and pre-tightening of the bolt are thus correctly determined and the integral working conditions can be fully ensured.In this paper, 650-ton working model of the Iarge m ultiaxial die-forging hydraulic press is taken as an example for the calculation to verify this analysis and the results of practical value and good accuracy are achieved, thus a critical point in the technology for the development of the large die-forging hydraulic press is resolved.