针对当前对脉冲激光波面半径测量缺乏有效的测试方法，提出了集大错位与等光程于一体的四平板剪切干涉法，达到对脉冲激光波面半径的高精度测量。Ｒ值在３０～１０００ｍ的范围内，测量误差小于±５％ Aiming at the current lack of effective testing methods for pulsed laser surface radius measurement, a four-plate shear interference method with large offset and equal optical path is proposed to achieve high-precision measurement of pulsed laser surface radius. R value in the range of 30 ~ 1000m, the measurement error is less than ± 5%