The invention discloses a wear-proof semi-open type solid-liquid two-phase flow pump impeller with detachable working faces. The impeller comprises an impeller rear cover plate; a plurality of basic blades are evenly arranged on the impeller rear cover plate in a peripheral direction; each basic blade is equipped with a blade working face lining plate; each blade working face lining plate is in aC shape, and can be attached to the working face, the inlet end face and the outlet end face of the corresponding basic blade; and each blade working face lining plate and the corresponding basic blade are detachably connected. According to the impeller, the blade working face lining plates and inlet edges are detachable, so that the impeller is prevented from frequently replaced, and the maintenance cost of the impeller is reduced.