Bathroom floor drain device for rotationally cutting cigarette ends by utilizing water flow trend

The invention discloses a bathroom floor drain device for rotationally cutting cigarette ends by utilizing a water flow trend. The bathroom floor drain device structurally comprises an inner middle inserting rod, a hollow cover, a mounting panel, an outer core shell, an inner core and a water conservancy potential energy cutting knife rest. Water flow slides upwards through a spiral disc body by means of the trend that the upper portion of the spiral disc body is narrow and the lower portion is wide, potential energy is generated by washing along the radian of a spiral concave rail on the surface of the disc body, then a brake part reinforces a supporting column, so that the disc body keeps neutral and is in friction output connection with a shaft shoulder on the outer wall of a middle ring connecting seat, thus a conical cutter rotating at a high speed along with the spiral disc body cuts off flattened cigarette butts which undergo water permeation and fall into a floor drain by meansof strong centrifugal fo