The invention provides a water pump with a filter screen convenient to replace. The water pump comprises a pump shell, wherein the water inlet at one side of the pump shell is fixedly connected with awater inlet pump head. One side of the water inlet pump head is fixedly provided with a first cylinder sleeve, one side of the first cylinder sleeve is provided with a second cylinder sleeve, the upper side and the lower side of the first cylinder sleeve and the lower side of the second cylinder sleeve are fixedly provided with a first fixing block and a second fixing block respectively, a limiting plate is arranged on one side of the second fixing block, and the two sides of the outer surface of the limiting plate are hinged to buckling rods respectively through hinging parts, and a connecting rod is fixedly arranged on one side of the buckling rod on the left side. A hollow sleeve pipe is fixedly arranged on one side of the buckling rod on the right side, and a torsion spring is fixedlyarranged in the hollow sleeve. According to the water pump with the filter screen convenient to replace, the buckling rod and the torsion spring are arranged to be matched with the first fixing blockand the second fixing block and are used for installing and fixing the first cylinder sleeve and the second cylinder sleeve, so that a filter screen body in the first cylinder sleeve can be conveniently detached, and the operation is simpler when the filter screen body is detached.