Domain controller time service system, domain controller and engineering machinery

The invention discloses a domain controller time service system, a domain controller and engineering machinery, the domain controller time service system comprises a central domain controller, a domain controller and a laser radar, the central domain controller is in communication connection with a satellite and is used for receiving reference time sent by the satellite communication; the regional controller is in communication connection with the central domain controller through a vehicle-mounted Ethernet, and time service is carried out between the central domain controller and the regional controller by adopting a generalized precise time synchronization protocol; the laser radar is in communication connection with the area controller through a vehicle-mounted Ethernet, and time service is carried out between the area controller and the laser radar by adopting the generalized precise time synchronization protocol. Therefore, high-precision time synchronization can be realized among the central domain cont