Abstract: In view of the problem of poor stability, low efficiency existed in distance detection method of low power semiconductor laser pointer, a measurement method of detection distance of laser pointer based on CCD detection technology was put forward. The detection distance equation of laser pointer with human eye as the receiver was deduced and modeling by using the CCD sensor and image processing technology. The function mathematical model between the two parameters of optical power and gray scale was also established. The least square method was used to solve correlation coefficient of the equation，the detection distance can be solved by correlation coefficient. The method realizes quantitative detection of detection distance of low power semiconductor laser pointer. The feasibility of the method is verified by experiment.