The invention discloses a ultraprecise grinding machine. The upper end of a first base is connected with a loading mechanism; an adjuster mechanism positioned on the right side of a controller is arranged at the upper end of the first base; a grinding device positioned at the back end of the adjuster mechanism is arranged at the upper end of the first base; the left side of the grinding device is connected with a guide rail; a ultrasonic cleaning machine is arranged at one end, near the grinding device, of a second base; the controller controls opening and closing of the ultrasonic cleaning machine; an air blower positioned below a water washing device is arranged in an inner cavity of the second base; the air blower is communicated with the water washing device through a pipe; and the guide rail penetrates through the ultrasonic cleaning machine, the water washing device, a drying device and a detecting device in sequence to reach a collecting platform. The ultraprecise grinding machine saves a lot of labor costs, reduces the conversion procedure, saves the working floor space, improves the data accuracy, is convenient for adjustment, and improves the grinding precision.