Diaphragm pump and water purifier

The invention relates to a diaphragm pump and a water purifier, and the diaphragm pump comprises a one-way valve which is provided with a drainage cavity; the shell is used for containing the one-way valve and provided with a water outlet cavity communicated with the drainage cavity, a plurality of flow guide ribs are evenly distributed in the water outlet cavity, one end of each flow guide rib is connected to the side wall of the water outlet cavity, and the flow guide ribs intersect in the water outlet cavity. The water purifier comprises the diaphragm pump. According to the diaphragm pump and the water purifier, the multiple flow guide ribs are evenly distributed in the water outlet cavity and divide the water outlet cavity into the multiple partition areas, so that water flow in the water outlet cavity flows out of the partition areas, the flow guide ribs can disperse the flow direction of the water flow, and the water flow is prevented from directly impacting the bottom of the water outlet cavity; theref