The invention provides a workpiece separating mechanism for a daubed shell production line. The workpiece separating mechanism for the daubed shell production line comprises a guide wheel, a suspension arm, a hanging dish, a separating assembly and a locating assembly. The suspension arm is connected onto the guide wheel in a suspension way and can move along with the guide wheel; the hanging dish is connected and fixed to the suspension arm in an inserting way, and can be used for hanging one or a plurality of workpieces; the separating assembly comprises a first air cylinder and a first fixed arm controlled by the first air cylinder; the first air cylinder controls the first fixed arm to clamp the hanging dish so as to separate the hanging dish from the suspension arm; the separating assembly further comprises a second air cylinder; the second air cylinder is used for fixing the hanging dish, so that a mechanical arm can conveniently take the hanging dish away from the first fixed arm; and the locating assembly is used for assisting the separating assembly to separate the hanging dish from the suspension arm. According to the workpiece separating mechanism for the daubed shell production line provided by the invention, the workpiece can be quickly separated from the suspension arm, and the processing efficiency of daubed shell processing is improved.