The invention discloses a method and system for highway overcrowding control based on block chain technology, and relates to the technical field of highway overcrowding system. Including the microprocessor and blockchain management system, the microprocessor receives the weight, height, width, and length data information of the data acquisition module; the microprocessor receives the serial number information of the RFID module; the microprocessor and the APP perform data transmission; the microprocessor Data transmission between the processor and the blockchain management system; the traffic police law enforcement recorder and road administration law enforcement recorder output real-time video information to the microprocessor through the APP; the data recording module outputs data information to the microprocessor through the APP; blockchain management The system transmits data with the public security management system, traffic police management system, and local government management systems. Through the role of blockchain technology, the present invention solves the problems of difficult information sharing, untimely information, opaque information, difficult unified coordination, inconsistent standards, lack of continuity in execution, and difficult execution supervision.