Abstract: In order to ensure the consistency and completeness of monitoring data in the safety monitoring system of coal mines, a design scheme for continuous transmission of disconnected data was proposed in response to faults in the monitoring substation equipment. The methods for fault recognition of data transmission, data preprocessing, data storage strategies, and data transmission protocols were studied. Based on the principle of invariable nonstorage, analog data with invalid values was cleaned up by bit storage compression of discrete transient data. Two-level storage of data was achieved by using FLASH and ferroelectric memory, and the data storage format and strategy were described. Network transmission protocols and bus transmission protocols were formulated separately to implement data continuation functions. The experimental results showed that after the main communication of the substation was interrupted, the monitoring data could be continuously stored for 7 days, and the correct rate of data continuation after the end of the failure reached 100%. This solution effectively solved the problem of missing data caused by equipment failure in the substation, ensured the integrity of monitoring data, and improved the reliability of the monitoring system.