Abstract: In view of shortcomings of existing coal mine wireless data transmission technologies, such as significant multipath effect, short transmission distance, poor noise resistance and low sensitivity, and demand for large-scale equipment information interconnection in coal industry, a wireless data transmission node for informatization upgrade of coal mine equipment was designed. The node establishes a reliable wireless data channel between devices through LoRa-CSS technology, uses PSoC, a programmable system-on-chip based on IP core structure, to flexibly adapt data interfaces of various coal mine equipments, and uses unified normalized data format for command and data information interaction. The electromagnetic isolation characteristic test results show that the node has strong isolation characteristic and is not affected by impact voltage, and can effectively reduce short-time high-intensity surge signal to the value below device tolerance. The actual application results show that the data communication between each node and the host computer and the coal mine equipments is ideal, and the node can effectively construct a stable data transmission channel from the central station to the equipment.