Bengbu uplift tectonic located in the south of Jiao-Liao-Ji orogenic belt in the North China Craton（NCC），the study of metamorphic evolution process in this area is still relatively weak. That restrict the people's understanding of the region. The paper cast a detail analysis in field observation，petrographic，thermodynamic evaluation and chronology for garnet pyroxenite and deteriorated amphibolite hornblende. And we give a more fully discussion to the mechanism formation of the uplift. According，this two kind of rocks record five periods metamorphic，as follows：The average P-T condition of Stage-Ⅰ：T=672±17 ℃ and P=1.05±0.02 GPa； The average P-T condition of Stage-Ⅱ：T=805±30 ℃ and P=1.21±0.04 GPa；The average P-T condition of Stage-Ⅲ：=T 615±13 ℃ and P =0.93±0.02 GPa； The average P-T condition of Stage-Ⅳ：T =632±6 ℃ and P=0.50±0.01 GPa；The average P-T condition of speculated Stage-V：T=400 ℃～450 ℃ and P=0.2～0.4 GPa. Stage-Ⅰ to stage-Ⅲ has been show a course of amphibolite facies → granulite facies → amphibolite facies，and it likely revealed a rapid heating and cooling process with nearly constant pressure. Stage-Ⅲ to stage-Ⅳ indicated a rapidly isothermal decompression process，and stage-V probably is a slowly cooling step down process. Summarized background information，predecessors' research and the zircon U-Pb chronology data（1 885±16 Ma）from deteriorated amphibolite hornblende in study area，we suggested that the five metamorphic stage of rocks revealed two events of metamorphic. Early phase represented by the stage-Ⅰ，stage-Ⅱ and stage-Ⅲ，Bengbu uplift tectonic may be gone through massive assault on the magma and the high temperature granulite facies metamorphic following in ～2.5 Ga. Later period show as a process of isothermal decompression from stage-Ⅲ to stage-Ⅳ，and it suggest the formation of Jiao-Liao-Ji orogenic belt in ～1.9 Ga in some degree.