In this article, the data synchronization problem of dynamic comparison between turntable angular measurement and ring laser gyroscope is studied. The synchronization problem between the turntable angular measurement and the ring laser gyroscope is analyzed and the synchronous angle deviation introduced by their different system delay is elaborated. Based on the analysis of synchronous angle deviation, a delay compensation scheme is proposed to make the output value of turntable angular measurement and ring laser gyroscope to the same turntable angle position at the same time. A real-time compensation circuit for synchronous angular deviation based on field programmable gate array is developed, and the key links of the circuit in the process of compensation are analyzed in detail. The experimental platform of dynamic angle measurement is established to evaluate the compensation effect of synchronous angle deviation and the results show that the proposed method can achieve outstanding compensation effect at different speeds. The difference of compensation effect at each speed is less than 0. 5″.