The invention discloses a vehicle speed limiting safety auxiliary system. The system comprises vehicle speed acquisition devices, a user setting device, an information receiving device, an over-speedwarning device and a speed limiting control device, wherein each vehicle speed acquisition device comprises an electric signal monitoring module, a timing module and a data management module, the vehicle speed acquisition devices are arranged in photovoltaic panels, and the photovoltaic panels are laid on a photovoltaic road surface. The invention further discloses an operation method of the vehicle speed limiting safety auxiliary system. Electric signal changes and the duration of the electric signal changes of the photovoltaic panels are monitored, so that the traveling speed of a vehicle isacquired in real time, when it is judged that the speed of the vehicle exceeds the speed limit, a driver can be forced to actively reduce the speed on the premise that operation of the driver is notdisturbed, and the traveling safety coefficient is increased.