The present invention provides a LoRa-based wireless communication system and belongs to the wireless communication technological field. The system comprises a controller and a LoRa gateway; the LoRagateway and a plurality of LoRa direct nodes form a star network; and each LoRa indirect node is indirectly connected into the LoRa gateway with one LoRa direct node adopted as a relay node. Accordingto the LoRa-based wireless communication system of the present invention, the LoRa wireless technology is adopted, and such communication technology has the characteristics of long communication distance, anti-interference performance, low power consumption and the like, so that the communication technology can adopt the star network architecture, and therefore, the complexity of the system is reduced, and power consumption is reduced; an intelligent node management algorithm can ensure that wireless channels do not conflict with each other; and on the basis of the LoRa wireless technology and the algorithm, a relay function is additionally adopted, and therefore, a transmission distance can be increased manyfold with the real-time performance of data transmission ensured, the wireless diffraction capability of the system can be enhanced, and long transmission distances can be still ensured in complex environments.