Abstract: Aiming at problems such as less of working hours length of fish farm feeding machine，untimely detection of lithium battery undervoltage，affecting working efficiency and reducing battery service life，a remote feeding machine battery management system based on LORA was designed.It realized real-time detection and feedback function of voltage，temperature and current of single battery of lithium battery pack powered by feeding machine in fishing ground，and charges and discharges according to state of lithium battery in time.The system has advantages of real-time，accuracy，safety and high efficiency.It could effectively solve problems of untimely charging and affecting work efficiency.The test data and results proved accuracy and safety of lithium battery management system of feeder.