The invention discloses a vertical connection decorative plate with a lock catch clamping groove. The vertical connection decorative plate is characterized in that a groove buckle (3) capable of being clamped into a clamping tongue groove (4) is arranged at the front end of a decorative plate body (1), the clamping tongue groove (4) capable of clamping the groove buckle (3) at the front end of the decorative plate body (1) is formed in the front end of a transverse plate (2), the decorative plate body (1) is buckled with the clamping tongue groove (4) through the groove buckle (3), the cross sections of the decorative plate body (1) and transverse plate (2), which are buckled through the groove buckle (3) and the clamping tongue groove (4), are perpendicular to each other, and a planar bonding face (5) facilitating bonding is arranged on the bottom face of the decorative plate body (1); and a decorative face (6) playing a decorative role is arranged on the surface of the decorative plate body (1). The outer edge, playing the decorative role, of the clamping tongue groove is longer than the inner edge clamped into the groove buckle. The vertical connection decorative plate is simple in structure, more attractive in appearance and convenient to operate. In the using process, the transverse plate is inserted into the clamping groove from the top, a door pocket line is formed and then installation is performed, and installation is convenient.