The utility model discloses an air bearing supports desk -top method inertia measuring device that rocks, including base, overcoat, rocking subassembly and workstation, rock the subassembly and include air bearing seat, air bearing, torsion bar seat and torsion bar, the air bearing seat is connected at the overcoat top, and air bearing's axle sleeve is connected with the air bearing seat, and the torsion bar seat is connected with air bearing's rotary main shaft lower extreme, and the upper end and the torsion bar seat of torsion bar are connected, are connected with the torsion bar adapter on the base, and the intermediate position department of torsion bar adapter is provided with the square hole, and the lower extreme block of torsion bar is connected in the square hole, the workstation is connected in air bearing's rotary main shaft upper end, and the bottom of workstation is provided with the balancing point, and air bearing seat top is connected with the photoelectricity tube socket, installs the photoelectron on the photoelectricity tube socket. The utility model discloses a reasonable in design, it is convenient and with low costs to realize, and stability is good, and measurement of efficiency is high, and measurement accuracy is high, and the aerodynamic drag influence is little, and the operational reliability is high, and the practicality is strong, excellent in use effect, convenient to popularize and use.