The invention discloses a radio frequency power amplifier module in a train intelligent monitoring network node. The radio frequency power amplifier module in the train intelligent monitoring network node comprises a main chip, a power supply circuit, a radio frequency input circuit, a radio frequency output circuit, a driving control circuit and a pre-amplification circuit, wherein the main chip is respectively connected with the power supply circuit, the radio frequency input circuit, the radio frequency output circuit, the driving control circuit and the pre-amplification circuit. On the research background of the train wireless sensor network technology, in order to guarantee normal communication after a train enters the environment with weakened signals such as a tunnel or a mountainous area, the radio frequency power amplifier module guarantees large enough output power through amplification and guarantees normal transmitting and receiving of communication data. The radio frequency power amplifier module in the train intelligent monitoring network node guarantees that in the environment with weakened signals, a monitoring network carries out real-time and continuous monitoring on the operation state of vehicle-mounted equipment, and reduces safety risks when the train runs. The radio frequency power amplifier module in the train intelligent monitoring network node can restrain same-frequency signals of an output end, prolongs the communication distance, improves the reliability of data transmission, and well guarantees correct transmission of monitoring data.