Grinding and polishing device applying floating motorized spindle

The grinding and polishing device applying the floating motorized spindle is stable in grinding and polishing quality, high in efficiency, capable of controlling the grinding strength and depth of parts, good in grinding and polishing effect and free of damage to the grinding head. Comprising an electric spindle power box body (1), a floating electric spindle (2), a deep groove ball bearing (3), a speed reducer fixing flange (4), a robot speed reducer (5), a rotary fixing shaft (6), a sealing cover (7) and a robot swing arm (8). A plurality of floating motorized spindles are transversely installed on a motorized spindle power box in an array mode, the motorized spindle power box rotates on a robot swing arm, a rotary fixing shaft is installed on a robot speed reducer through a speed reducer fixing flange, a deep groove ball bearing is arranged at one end of the motorized spindle power box in a sleeving mode, and a sealing cover seals one end of the motorized spindle power box. The grinding head of the floatin