The utility model provides a filter cup of ability dismouting, comprises a cup body and a cup cover, install purifier between cup and the bowl cover, purifier includes frame and filter layer, the bottom inner wall of frame is equipped with first internal thread, the bottom outer wall of cup is equipped with the first external screw thread with first internal thread looks adaptation, frame top outer wall is equipped with the second external screw thread, the inner wall of bowl cover is equipped with the second internal thread with second external screw thread looks adaptation, the cup inner wall is equipped with first passageway, the straw is installed to first passageway, first passageway is equipped with the logical groove of lining up cup body outer wall, and it is trapezoidal support that the opening in logical groove is equipped with the cross section, support left and right sides inner wall is equipped with the spout, gliding pinch roller is from top to bottom installed to the spout, the utility model discloses convenient dismouting purifier, filtered water that can be fine simultaneously also can be convenient the change, moreover the speed that also can be through adjusting straw control drinking water and the volume of drinking water drunk more healthily.