The utility model discloses a transmission line monitoring system based on Zigbee and Labview. The transmission line monitoring system comprises an upper computer monitoring table, a plurality of master nodes and slave nodes, wherein the master nodes and the slave nodes form a Zigbee network; operation state information of a transmission line is collected from the nodes, and then is transmitted to the master nodes through the Zigbee network; the master nodes transmit the received operation state information of the transmission line to the upper computer monitoring table in an RS232 communication manner. According to the transmission line monitoring system, the reliability, the safety and the stability are improved while the cost of the system is reduced, the defects of poor instantaneity, low efficiency and large error in an existing monitoring mode are overcome, the transmission line monitoring system has the functions of real-time data display, analysis and storage, and a data basis is provided for long-term safe operation of the line.