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With the development of science and technology and the intensification of competition in the touch device market, flat-panel touch screens have entered a thriving environment. Infrared touch screen is not affected by current, voltage and electrostatic interference, and is suitable for some harsh environmental conditions, and has many advantages such as low price, convenient installation, and can be used in various grades of computers. Therefore, the research on infrared touch screen becomes more important. Infrared touch screen, which is a transmitting and receiving infrared sensing element installed on the touch screen frame. It will form an infrared detection network on the screen surface. When any touching object touches the screen surface, it will block the corresponding infrared, so that the corresponding receiver can't receive the signal, thus determining the contact coordinates and operating the touch screen. However, due to technical reasons, a point often appears in actual operation (that is, it is not a real touch point), which affects the touch screen effect. Aiming at the infrared touch screen provided by Beijing Guanhui New Technology Co., Ltd., the researchers conducted a lot of experimental operations, statistically analyzed the obtained data, and obtained relevant data points. This paper takes a certain point as the research direction, obtains the occurrence characteristics of this point by analyzing the statistical data of control variables, and improves the infrared touch screen according to the analysis scheme to eliminate the aiming of this point.