A sealing plug assembly includes a plug body, a guide ring, a seal ring and an elastic return member. The plug body has an annular outer wall surface and a first annular assembly groove. The annular outer wall surface has an opposite side edge and an exposed side edge. The first annular assembly groove is located on the annular outer wall surface and is interposed between the insertion side edge and the exposed side edge. The guiding ring is sleeved on the plug body and located in the first annular assembly groove. The guide ring has a first continuous bevel. The first continuous slope has a first side and a second side opposite to each other. The first side is closer to the exposed side edge than the second side, and the first side is away from the central axis of the plug body than the second side. The sealing ring is sleeved on the plug body and located in the first annular assembly groove. The seal ring has a second continuous ramp that matches the first continuous ramp. The elastic return member is sleeved on the sealing ring.一種密封栓塞組件，包含一塞體、一導引環、一密封環及一彈性復位件。塞體具有一環形外壁面及一第一環形組裝槽。環形外壁面具有相對的一塞入側緣及一外露側緣。第一環形組裝槽位於環形外壁面，並介於塞入側緣與外露側緣之間。導引環套設於塞體且位於第一環形組裝槽。導引環具有一第一連續斜面。第一連續斜面具有相對的一第一側及一第二側。第一側較第二側靠近外露側緣，第一側較第二側遠離塞體之中心軸線。密封環套設於塞體且位於第一環形組裝槽。密封環具有一第二連續斜面，第二連續斜面匹配於第一連續斜面。彈性復位件套設於密封環。
