The invention discloses a waterway switching mechanism and a shower including the waterway switching mechanism. The waterway switching mechanism comprises a fixed portion and a rotating block rotatly connected to a fixed portion. The fixed portion is provided with a plurality of switching position. Each switching position is provided with a sealing portion that can move relative to the fixed portion in the first direction, and the waterway switching is controlled through the activity of the sealing portion. The outside wall is provided with a pushing portion, the plurality of sealing portion circumferentially spaced apart and surround outside of the rotating block. Each of the sealing portion is provided with a fitting portion capable of cooperating with the pushing portion, when the rotating block rotates the pushing portion follows the rotating block and move in a circumferential direction, and the fitting portion is driven to move in the first direction by a circumferential movement of the pushing portion, and the first direction intersects with vertical plane of the vertical swivel axis of rotation. It has the following advantages: The layout is reasonable, the structure is more compact, the friction is reduced, and the service life is prolonged.