Abstract: The tempo-spatial distribution and tectonic attribute of the Paleoproterozoic orogens of the North China Craton (NCC) are strongly controversial. One model argues that three times of continental collision occurred sequentially during the period of 1.85-1.95 Ga in the NCC, resulted in the formation of three Paleoproterozoic orogens, i.e. the Khondalite belt, Jiao-Liao-Ji belt and the Trans-North China orogen (TNCO). The other model contests that the above three orogens may have experienced the same long-lived evolutional history within the period of 1.80-1.98 Ga, suggesting particular hot subduction and collision in Paleoproterozoic. Summarizing the recent advances of the study on metamorphism in the Wutai-Hengshan region, this paper presents the time and tectonic attribute of the Paleoproterozoic orogeny. The main litho-structural units in the Wutai-Hengshan region include the Hengshan complex, Wutai complex and Hutuo Group. The Hengshan and Wutai complexes are recognized to have undergone two phases of metamorphism. The first phase was identified to be a medium-pressure type, which was attributed to resulting from a crust thickening orogeny related to the closure of back-arc basins due to continental collision. A progressive metamorphic series can be revealed, including, from south to north, the low-amphibolite facies of the lower Wutai Group and the southern part of the south Hengshan complex, the high-amphibolite facies of the northern part of the south Hengshan complex and the high-pressure granulite facies of the north Hengshan complex, with their pressure peak conditions corresponding to a geothermal gradient of~15℃/km. With increasing in metamorphic grade, the peak ages from metamorphic zircons show a decreasing trend, which are~1.95 Ga, ~1.92 Ga and~1.85 Ga for the low-amphibolite, high-amphibolite and granulite facies rocks respectively. This is because zircon growth during metamorphism depends on the behaviors of fluids and melts, which results in that metamorphic zircons tend to record the time of the peak stages for metamorphism under subsolidus conditions, but to date the retrograde stage with melt crystallization during metamorphism under suprasolidus conditions. As a result, the pressure peak stage of the medium-pressure type metamorphism is determined to be~1.95 Ga, also equivalent to the peak stage of the crust-thickening orogeny. Due to gravity isostasy in the thickening crust region, metamorphic rocks may exhume from deep crust to middle crust, displaying as the post-peak isothermal decompression (ITD) to 0.5-0.7 GPa in P-T paths, and suggested from the 'white eye socket' textures formed by the decomposition of peak garnet under fluid-absent conditions. The metamorphic zircon ages of 1.92 Ga from the high-amphibolite facies rocks of the northern part of the south Hengshan complex were interpreted to represent the decompression of medium-pressure rocks, also constraining the termination of the first-phase orogeny. The second phase of metamorphism is inferred to be a low-pressure type, resulted from deformation within-plate, and displaying as the formation of equilibrium assemblages that overprinted the exhumed medium-pressure rocks triggered by compressional shearing and fluid infiltration. The Zhujiafang shearing belt could be a high-strain zone produced in this within-plate deformation, which also records a clockwise P-T path, but indicating limited crustal thickening. The second phase of metamorphism and deformation was constrained to occur mainly at~1.85 Ga. The sinistral strike-slip of the Zhujiafang shearing belt may have resulted in the uplifting of the north Hengshan granulite terranes. Two phases of metamorphism and deformation were proposed to have occurred within the period of 1.80-1.96 Ga in the Wutai-Hengshan region, which could be significant for discussing the Paleoproterozoic orogenic evolution from the other domains in the NCC.