The water grinding machine is a specialized grinding equipment for floor construction. The mainstream types include push-type portable, driving-type, and floor tile fixed-type. The complete machine consists of a three-phase drive motor, gear reduction assembly, diamond grinding disc, water supply system, and hand-held control frame. Common models are 250 and 350, with a power of 3 to 7.5 kW, compatible with 220V/380V power supply. The grinding disc can be disassembled to replace the diamond grinding blocks, which are divided into three types: coarse grinding, fine grinding, and polishing. For wet operation, a water spray system is provided for cooling and dust removal. New models are equipped with an air suction device to achieve dry grinding and environmentally friendly construction. It is widely used for grinding water-grinding floor in shopping malls, factories, schools, and residential areas, leveling concrete floors, renovating old stone, and batch grinding of pre-fabricated water-grinding floor tiles and square tiles, replacing traditional manual grinding and increasing construction efficiency by ten times or more.