The intrusive complex in Pingshun area, southern Taihang Mountains consists of rocks of the early stage and advanced stage. The intrusive rocks of the early stage are mainly composed of olivine gabbro—diabase, and the intrusive rocks of the advanced stage diorite—monzodiorite, while the later black unequal particle diorite is formed in their contact segment. A large amount of relict crystals of olivine, pyroxene and hornblender can be found in the earlystage intrusive rocks while a comparatively small amount of relict crystals exist in the intrusive rocks of advanced stage. Occasionally, we can see disequilibrium phenomenon of composition and structure in plagioclase. The rocks of the early stage and advanced stage are similar in some geochemical features such as low slicon and high magnesium, enrichment of light REE with a weak positive anomaly of Eu and depletion of heavy REE, enrichment of LILE, especially Sr, Ba and K and depletion of HFSE, especially Nb, Ta and Ti and enrichment of radiogennic lead ［n(206Pb)/n(204Pb)=17.741~18.474，n(207Pb)/n(204Pb)=15.429~15.612］. Petrological and geochemical characteristics of these two types of rocks indicate that they are comagmatics and originated from partially melting of EM, in which magma was formed with the high temperature fluid leading to partial melting of lower crust( especially TTG) ,in which granitoid magma were first formed and the mixed magma later. Finally the Pingshun complex was formed by fractional crytallization of magma.