The present disclosure provides a lower position water suction assembly, including a jet flow element configured to convey water in a water tank and outside tap water together into a bowl part of a toilet. The lower position water suction assembly also includes a lower position water suction pipe connected to the jet flow element and configured to convey the water in a lower portion of the water tank into the jet flow element. The lower position water suction pipe includes a water suction pipe port comprising a plurality of projections configured to contact an inner bottom surface of the water tank and draw the water from the lower portion of the water tank.