本文扼要阐述在激光干涉测量的数据处理中，采用特殊的“自动移位分频”逻辑，与交错进位可逆二进制累加器相结合；从而使小数有理化的运算精度高，工作速度加快。在双频激光干涉仪中，为了实时运算和显示，研制成一种“快速随机脉冲减法器”，文中简要的阐述了其主要思路及特点，其相减出的脉冲均匀，速度快。 This article briefly describes the data processing of laser interferometry, using a special “automatic shift frequency division” logic, and staggered-carry reversible binary accumulator combination; so that the decimal arithmetic and high precision, speed up work. In the dual-frequency laser interferometer, a kind of “fast random pulse subtracter” was developed for real-time operation and display. The main ideas and characteristics of the dual-frequency laser interferometer are briefly described. The subtracted pulses are uniform and fast.