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In order to solve this problem, a monitoring system with synchronous rectification function is designed for intelligent environmental protection equipment operation monitoring system. E2PROM read-only memory, which modifies content in the form of byte unit of electronic signal, can get rid of the restriction of early programming. IS61LV25616AL-10TL asynchronous static random access memory (ASRAM) is used to exchange data directly with CPU. The results of the exchange are transmitted to the monitor to determine the degree of environmental pollution. Using AS150PDK-14712S type 50 segment heterochromatic cursor LED alarm device, the upper and lower limit alarm module is controlled, and the abnormal state is monitored and alarmed by monitoring circuit. According to the program flow of the lower monitor, synchronous rectification technology is adopted to analyze the relationship between driving voltage and total voltage, and optimize the operation loss of equipment. The experimental results show that the monitoring accuracy of the system is higher than that of the traditional system and meets the requirements of environmental protection.