The present invention provides a spin mop with visible spin-drying/cleaning state, including a mop bucket and a spin mop. The mop bucket is provided with a support seat, the spin mop includes a mop rod and a mop head for installing a mop cloth. The mop head is provided with a color difference switching mechanism, the color difference switching mechanism includes a movable color block movably installed on the mop head and a visible window provided corresponding to the movable color block, the movable color block is slidably/swingingly connected to the mop head. When the mop head spins at a high speed to perform spin-drying, the movable color block slides/swings towards the visual window or the movable color block slides/swings away from the visual window, such that the movable color block is placed under or gets away from under the visual window.