Aiming at the measurement of the moving velocity of two-phase flow particles, a dual-path laser velocimetry experimental system was designed based on the principle of cross correlation, and an optical cross correlation velocimetry experiment was carried out by using a known rotating linear velocity device driven by a variable frequency motor. By measuring the intensity signal of the dual-path lasers around the rotating wire, rotation line velocity of wire at the measured point was calculated by the cross correlation analysis of the two intensity signals of the dual-path lasers. Compared with the calculated line velocities of wire at the measured point by using the rotate speed of motor, the relative deviations were less than 6%, verifying the accuracy of optical mutual light velocimetry.