A scheme for high precision time synchronization measurement of laser pulses is presented. The time to digital conversion technology is used to measure the relative time delay of laser pulses accurately, and the measurement accuracy is less than 10 ps (the peak-valley value). In order to meet the requirements of the input pulse width of the measuring circuit, an electric pulse broadening module is designed for short laser pulse. An electric pulse signal can be broaden from hundred picoseconds to nanoseconds, with the root mean square of the additional jitter less than 2 ps. This scheme can realize the real-time high precision time synchronization measurement, and can be used for real-time monitoring of a time synchronization feedback compensation system.