The invention discloses a manual cutter with a mosaic tile cutting function. The manual cutter comprises a supporting seat mechanism and a cutting head mechanism, wherein the supporting seat mechanism comprises a base, vertical connection rods arranged at two ends of the base and a horizontal guide rod for connecting the two vertical connection rods; the cutting head mechanism comprises a cutting head body, a push-and-pull handle, a cutting wheel component and a leg pressing component; the cutting head body movably sleeves the exterior of the horizontal guide rod; the push-and-pull handle is arranged at the top of the cutting head body; the cutting wheel component and the leg pressing component are arranged at the bottom of the cutting head body; the manual cutter also comprises a frame plate pressing mechanism positioned between the cutting head body and the base; two ends of the frame plate pressing mechanism movably sleeve the exteriors of the vertical connection rods; and a returning spring which movably sleeves the exteriors of the vertical connection rods to support the frame plate pressing mechanism is arranged between the frame plate pressing mechanism and the base. The manual cutter can well adapt to the cutting requirements of the mosaic tiles and simultaneously can adapt to the cutting requirements of the large-area tiles; the manual cutter is very convenient and quick to use; the cutting efficiency and the cutting effect can be greatly improved.