Abstract: Aim To investigate the synchronization measurement method of evaluating pulsed laser beam quality. Methods Several synchronization methods were designed according to the research on the charactristics of pulsed laser beam and CCD measurement system. Results The measurement experiment of YAG laser beam was successfully implemented on the condition of different pulse frequencies, the experiment's result showed the M 2 actor of YAG pulsed laser beam is of the order of ten. Conclusion The effectiveness of the synchronization method has been verified, so it can be used to evaluate the pulsed laser beam quality.