Laser interferometer is a typical measuring instrument in high-precision absolute gravity measurement. During the conventional process of single measurement, it generally involves motor drive, data acquisition, gravity acceleration absolute value calculation, and measurement results display and storage. During the process of sequential control, it requires a lot of time and a large output time error. In this study, an innovative time-optimization method is proposed. A time optimization model of the two-process time-reuse mechanisms of motor drive and post-acquisition data processing before data acquisition is formulated. The steps in the sequential control mode are optimized and reconfigured to achieve the goal of reduce the measurement time of conventional measurements and the error of result output time. The practical measurement results show that the time optimization method could reduce the time from the original 34. 3 s±0. 3 s to be the precise 22 s, and the error is 5 milliseconds. The measurement efficiency is greatly improved. Meanwhile, the precise control of a single measurement time is achieved. However, it increases the feasibility of fusion analysis with similar observation data.