The utility model relates to a right-angle check valve comprising a valve body and a valve cover, wherein an inlet and an outlet are arranged in the valve body, the valve cover is connected with the valve body and arranged at the upper end of the valve body, a guide sleeve is arranged on the lower portion of the valve cover, the valve disc is arranged at the lower end of the guide sleeve, the valve disc is sleeved on a guide rod of the guide sleeve and can move up and down along the guide rod, a baffle is arranged between the inlet and the outlet of the valve body, a through hole is arranged in the baffle, and the top end of the valve disc and the baffle can be connected in a contact mode so that the through hole is sealed. The upper end of the guide sleeve is provided with a ring-shaped edge arranged between the valve cover and the upper end face of the valve body, and a sealing ring is also arranged between the ring-shaped edge and the upper end face of the valve body. Compared with the prior art, the valve body, the valve cover, the guide sleeve and the valve disc are made from bronze and high in strength. The guide sleeve and the valve disc can move flexibly and are wear-resistant. The valve disc and the valve body are in good sealing connection. The right-angle check valve is compact in structure, good in sealing property, and long in service life.