The NNE- striking Yingyangguan Tectonic Belt is located in the southwestern part of the South China Block. It is still controversial about whether it is an ophiolite mélange, a rift zone or an intracontinental tectonic deformation zone. Based on reviews of petrographic compositions and geochronology, structural analysis was executed in the Yingyangguan Tectonic Belt, and its tectonic attribute and tectonic evolution were proposed. The Yingyangguan Tectonic Belt is mainly composed of middle to late Neoproterozoic island arc- type andesites and basalts, rift- type bimodal volcanic rocks, cap carbonate rocks and sandstones and mudstones. The rock association with different ages and rocks are sedimentary mélange caused by gravity under the background of late Neoproterozoic rift and extension. The Neoproterozoic sedimentary mélange experienced the Kwangsian, Late Indosinian and Yanshanian orogeny during the Phanerozoic era, which formed the fault contact relationships between different blocks. The Kwangsian orogeny (450~415 Ma) led to the development of the near E—W- trending tight folds, thrust faults and granite emplacement in the Neoproterozoic sedimentary mélange. The late Indosinian orogeny (227~220 Ma) built the NNE- trending Yingyangguan Tectonic Belt, which was characterized by NNE—SSW- striking folds, thrust faults and sinistral ductile shear zones. The Yanshanian orogeny re- activated strongly the NNE—SSW- trending faults to normal faults and right- lateral strike- slip faults, which controlled the development of the Cretaceous basin. Based on petrographic compositions, geochronology and structural analysis, the Yingyangguan Tectonic Belt is only a Late Indosinian intracontinental tectonic belt instead of a Neoproterozoic or an Early Paleozoic ophiolite mélange with suture nature.