The utility model relates to a safe formula lavatory pan, including bedpan body and detachable cushion, there is the opening at bedpan body top, there is inward turn -ups at the open -ended border, the surface of the forced section of bedpan body is located to the cushion, the other end that the bedpan body is relative with the forced section is equipped with emptys the portion, turn down rims edge welds with the inner wall of bedpan body, turn -ups and the junction smooth transition who emptys the portion. The utility model discloses simple structure does benefit to and emptys thoroughly, canavoid the scotch of patient sacrococcygeal region simultaneously.