The utility model provides a protective layer gauge control component for the frame of reinforcing bar net piece props, including the component main part with set up in the frame portion of propping at component main part top, the frame is seted up the frame that the frame propped reinforcing bar net piece in the portion of propping and is propped the groove. The roof waterproof protective layer is netted the piece by the member main part with the reinforcing bar and is erected before building, and the top of framework main part sets up the frame portion of propping, offers the frame in the frame portion of propping and props the groove, and reinforcing bar net piece falls into the frame and props the inslot, props the groove by the frame and carries on spacingly to reinforcing bar net piece, nets the rack through protective layer gauge control component with the reinforcing bar and props up a take the altitude, props the groove by the frame on it and carries on spacingly to the horizontal position of reinforcing bar net piece, can directly build waterproof layer after arranging the completion, has simplified the degree of difficulty of building of protective layer.