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In view of problems of cumbersome wiring work, inconvenient operation, high cost and low efficiency existed in monitoring for coal mine roadway roof security with data collection of wired network, a safety monitoring system for coal mine roadway based on ZigBee technology was designed. The system uses wireless strain gauge to measure stress-strain of roadway roof automatically, adopts computer administer program to analyze stress-strain of coal mine roadway roof, and evaluates the safety of coal mine roadway. The testing result shows that the system has advantages such as small error, easy operation, low cost and high efficiency.