The quality of the laser cutting machine produced by different manufacturers is different because of the difference in technology. Customers should know how to check the quality of the laser cutting machine when buying the laser cutting machine. Only in this way can you buy a suitable laser cutting machine, and avoid affecting the work due to the quality of the laser cutting machine in the production work. The main indicator of a high-quality laser cutting machine is that there is no cutting defect and the cutting surface roughness value is small, so the real-time detection target should be able to identify the cutting defect and detect the information reflecting the roughness of the cutting surface, in which the roughness information can be obtained The most important and the most difficult. In the detection of the roughness of the cutting surface, an important research result is to find that the main frequency of the pulsation spectrum of the optical radiation signal at the cutting front is equal to the frequency of the cutting fringe of the cutting surface, and the frequency of the cutting fringe is related to the roughness. The radiation signal is related to the roughness of the cut surface. The characteristic of this method is that the detection equipment and signal processing system are relatively simple, and the detection and processing speed is fast. Further research has shown that the consistency of the main frequency of the optical radiation signal at the cutting front and the fringe frequency on the cutting surface is limited to a smaller cutting speed. When the cutting speed is greater than a certain cutting speed, the main frequency of the signal disappears, and it can no longer be found. Any information related to cutting stripes. Therefore, only relying on the light radiation intensity signal of the cutting front has great limitations, and it is difficult to obtain valuable information on the surface roughness of the cutting machine at a normal cutting speed, especially the information of the roughness near the lower edge. The use of the visual sensor to monitor the cutting edge and spark shower images at the same time can obtain more comprehensive and rich information about the cutting defects and the roughness of the cutting surface. In particular, the shower of sparks ejected from the lower end of the slit is closely related to the quality of the lower edge of the cutting surface, and is an important source of information for obtaining the roughness of the lower edge of the cutting surface. The spectrum and main frequency of the optical radiation signal at the front of the laser cutting machine extracted are only related to the cutting stripes on the upper part of the cutting surface, and do not reflect the condition of the cutting stripes on the lower part. The information obtained is not the most valuable information. It is unreasonable and unreliable to use it as a basis for cutting quality evaluation and control. Wuhan Gaoneng Laser Equipment Manufacturing Co., Ltd. is a high-tech enterprise integrating Ru0026D, production and sales of professional laser complete equipment. Not only successfully developed laser equipment with advanced technology, but also used self-support import and export rights to promote products to more than forty global products including Hong Kong, South Korea, Vietnam, Malaysia, Thailand, Australia, the United States, Japan, Germany, the Netherlands, Jordan, etc. nation.