The utility model relates to the technical field of mousing hooks, in particular to a top window mousing hook, which comprises a clamping part, a second horizontal limiting clamping plate, a vertical plate, a connecting part, a connecting part, a connecting part, a connecting part, a connecting part and a connecting part, and is characterized in that the clamping part comprises a first horizontal limiting clamping plate arranged at the upper part of the clamping part and a second horizontal limiting clamping plate integrally connected with the first horizontal limiting clamping plate; the second horizontal limiting clamping plate is arranged on the vertical plate far away from the first horizontal limiting clamping plate; the extension clamping plate is arranged in an L shape and is integrally connected with the vertical plate; the extending part and the clamping part are integrally formed, the extending part comprises a first V-shaped extending plate arranged on the extending clamping plate close to the second horizontal limiting clamping plate and a second V-shaped extending plate vertically arranged and integrally connected with the first V-shaped extending plate, and the safety of operation of the transom window is improved.