The surrounding rock of retrograded eclogite from Chicheng, north Hebei is mainly composed of biotite-plagioclase gneiss, the protolith of which consists of Proterozoic Hongqiyingzi group and Paleozoic supracrustal rock. The protolith of retrograded eclogite occurs to be the basic intrusions in the supracrustal rock. This paper proposed a new interpretation for the geological evolution of the northern margin in North China since Paleozoic. The peak eclogite facies metamorphism occurred in 355Ma, which represented the age of subduction. The retrograde metamorphism in amphibolite facies occurred between 320Ma to 300Ma during the uplifting process. Then, a large scale thermal event in a broad range of influence occurred during 280-290Ma，with abundant fluid contributing to the intense recrystallization of the zircons，making it difficult to preserve the chronology information recorded before. The meta-diorite in West Sidaogou recorded a metamorphic event occurring in 240Ma. This is a significant reflection that the continental crust of Chicheng area had been in subduction during the close of Petro-Asian ocean and also experienced eclogite facies metamorphism. Soon afterwards the whole northern margin of North China was in extensional environment and influenced by the large scale thermal event until it was transferred into compressional tectonic setting and finally closed during Late Paleozoic to Early Mesozoic .