Then invention discloses a wall-mounted leakage protector. The wall-mounted leakage protector comprises a substrate provided with a tripping mechanism accommodating cavity, an incoming power supply wiring mechanism, an outgoing power supply wiring mechanism, an electromagnetic tripping mechanism, a reset operating mechanism, an end cover and a protective trimming cover, wherein the substrate is provided with a left fixed wing and a right fixed ring of the substrate and a front fixed wing and a rear fixed wing of the substrate; the incoming power supply wiring mechanism is arranged on the leftfixed wing of the substrate; the outgoing power supply wiring mechanism is fixed with the bottom of the substrate; the electromagnetic tripping mechanism is arranged inside the tripping mechanism accommodating cavity and is matched with a contact mechanism, and the contact mechanism is accommodated inside the tripping mechanism accommodating cavity and is connected with the incoming power supply wiring mechanism and the outgoing power supply wiring mechanism; the reset operating mechanism is matched with the electromagnetic tripping mechanism; the end cover is fixed with the substrate at the position corresponding to the upper part of the tripping mechanism accommodating cavity; the protective trimming cover is fixed with the substrate at the position corresponding to the upper part of thesubstrate, an end cover avoiding cavity is arranged on the protective trimming cover and corresponds to the position of the end cover, the end cover is matched with the end cover avoiding cavity, andthe reset operating mechanism stretches out of the end cover. The wall-mounted leakage protector has a modularization effect and is small in size; the structure is simplified, and the wall-mounted leakage protector is beneficial for manufacturing and assembling; and the wall-mounted leakage protector is low in cost, stable in performance, high in sensitivity and high in reliability, and the safety is guaranteed.