In order to solve the problems of traditional laser marking instrument target measurement methods such as difficulty in manual reading,and low efficiency,this paper designed a laser marking instrument design device hardware system and software algorithm based on visual image detection technology.The system hardware device is built through the data acquisition unit,target system unit and multi-functional lifting workbench unit;the image repair method is used to segment the original image laser line and the background,extract the reference center origin and perform system calibration,and use the image repair method to extract the laser Measure the line,calculate the offset of the measurement characteristics,and design interactive software based on the algorithm to automatically measure and save the data.Finally,through the solution device in this article and the traditional solution method,the same laser marking instrument was determined for comparison experiments.The experimental result|E,l≤1,the result was judged to be satisfactory,and the space for adjusting the system was verified.