Shower door and movement mechanism thereof

The utility model discloses a shower door and a movement mechanism thereof. The shower door comprises an upper guide rail frame and a roller assembly, a guide rail groove is formed in the upper guiderail frame, and the idler wheel assembly is arranged in the guide rail groove in a sliding mode. An opening of the guide rail groove is downward, the two sides of the opening of the guide rail groovehorizontally extend inwards to form supporting edges, and the upper surfaces of the supporting edges are obliquely arranged downwards. The rolling wheel assembly comprises a support and rolling wheels, the rolling wheels are oppositely and rotatably connected to the left side and the right side of the support, the rolling wheels are arranged to be in a circular truncated cone shape, and the wheelfaces of the rolling wheels are matched with the upper surfaces of the supporting edges; by means of the arrangement, a user can conveniently remove dirt in the guide rail groove, smoothness and silence during pushing and pulli