一般认为:脉冲激光测距仪的测距误差⊿R等于计数误差⊿Rc,又等于正负距离量化单元l,即⊿R=⊿Rc=±l。我们认为三者一般互不相等,因为在目前设计情况下,时标频偏误差和脉冲前沿误差不能忽略,⊿R■⊿Rc。由子时标脉宽的影响,一般⊿Rc■±l。本文分析了上述三项测距误差,讨论了实验数据,提出了减小误差的措施 It is generally believed that the range error ⊿R of the pulsed laser range finder is equal to the counting error ⊿Rc, which is equal to the positive and negative distance quantisation unit l, that is ⊿R = ⊿Rc = ± l. We think the three are generally not equal to each other because in the current design case, the time-frequency offset error and the pulse front-end error can not be ignored, ⊿R ⊿ ⊿Rc. Sub-standard pulse width by the impact of the general ⊿ Rc ■ ± l. This paper analyzes the above three distance measurement error, discusses the experimental data, and puts forward the measures to reduce the error