Precision air-bearing turntable

The invention discloses a precision air-bearing turntable. The precision air-bearing turntable comprises a shell, an air bearing, a motor and a revolution mandrel, the air bearing comprises a main shaft system and an air guiding system, the main shaft system comprises a hollow shaft I, a hollow shaft II, an upper thrust plate and a lower thrust plate, the hollow shaft I is arranged between the upper thrust plate and the lower thrust plate, and the hollow shaft I is in clearance fit with the hollow shaft II, the upper thrust plate and the lower thrust plate; the revolution mandrel is sleeved in the hollow shaft II, and the hollow shaft II is in interference fit with the revolution mandrel; and the air guiding system comprises an air guiding ring, an air inlet channel and an air outlet channel. The precision air-bearing turntable overcomes the disadvantages of severe mechanical wearing, high friction loss and low precision of traditional turntables, has the advantages of no noises or friction force disturbance,