Rainwater pipe joint structure on outer wall

The utility model relates to the technical field of rainwater pipes, in particular to a rainwater pipe joint structure on an outer wall, which comprises a wall body and a mounting frame pre-buried on the wall body, the mounting frame comprises a mounting plate mounted on the outer side of the wall body and a sleeve arranged on the mounting plate, the sleeve slidably sleeves a drainage pipe, and an inner ring groove is formed in the inner side wall of the sleeve; the groove wall of the end part of the inner ring groove is fixedly connected with a sealing ring which is coaxial with the sleeve; when the sleeve is arranged at the joint of the two drainage pipes in a sleeving mode, the opposite ends of the two drainage pipes in the sleeve jointly clamp the sealing ring. When the casing pipe is sleeved on the side wall of the drainage pipe, the sealing ring is pressed into the inner ring groove by the side wall of the drainage pipe. Installation of the rainwater pipe on the outer wall can be facilitated. 本申请涉及雨水管的技