The invention provides an intelligent traffic light safety dynamic regulating and controlling method based on the alliance block chain technology. A vehicle-mounted unit, a roadside unit, a transportagency and an ACP system are included. The vehicle-mounted unit sends real-time road condition information to the roadside unit, the information is recorded in blocks through pre-selected bookkeepingroadside unit nodes, the transport agency decodes and acquires the road condition information from block chains, an intelligent contract is triggered to be automatically executed, and the duration oftraffic lights is dynamically regulated and controlled by the ACP system through the acquired road condition information. After the traffic lights are regulated and controlled, the reputation value ofthe vehicle-mounted unit is evaluated through the transport agency, and the real-time road condition information and other services can be enjoyed by paying the reputation value. The problem of centralization of traffic light control is solved, high human intervention in the traffic light management and coordination processes is reduced, and financial resources and material resources are saved. Coordination optimization of traffic light management and control is achieved, and the safe and credible communication environment is provided for a vehicle-mounted Ad-Hoc network. Meanwhile, the confidentiality, privacy and non-repudiation of the information are guaranteed.