Abstract: A dynamic method for investigating the molding process and the mechanical strength of solid catalyst was presented.By means of two sets of equipment(catalyst molding process analyzer CMPA and catalyst mechanical properties tester CMPT) designed and fabricated by the authors in laboratory, the dynamic study for Fe-Cr WGSR catalyst pellets was carried out based on the orthogonal experimental design, the effects of some factors in the molding process of Fe-Cr WGSR solid catalyst on the mechanical strength of catalyst pellets were systematically examined, and the molding conditions were optimized. The results showed that there existed the relationship between catalyst pellet density and compact pressure, and the concept of macroscopic elastic modulus was introduced.Furthermore, the remarkable factors (such as predensification process and calcination temperature) affectng Y₀ factors, macroscopic elastic modulus E′, rate of densification and side crushing strength were also investigated.