A measuring cup for a waste oil extraction machine is disclosed in the present invention, comprising an organic glass made cup body (1) provided with an explosion-proof valve connecting hole (11), a negative-pressure meter mounting hole (12) and several pull-rod insertion holes (13) thereon; the top of the cup body (1) is in a cone shape; the cup body (1) is further provided with several water-drop-shaped bulges (14) projecting outwardly and longitudinal grooves (15) on the outer surface thereof; the bulges (14) and the grooves (15) can effectively improve strength of the cup body (1).