The invention relates to a smart street lamp control system based on dynamic capture. The system comprises a plurality of street lamps. Each of the street lamps is provided with a radar detector, andthe radar detector is arranged towards a road and used for detecting a detected vehicle on the road to generate a detection signal for the detected vehicle. A radar control subsystem comprises a modeling module, a real-time positioning module and a dynamic capture module. The modeling module is configured with a modeling strategy, wherein the modeling strategy comprises a pre-established road coordinate model, and the position of each radar detector is calibrated in the road coordinate model. The real-time positioning module is configured with a positioning strategy and a positioning calculation unit. The dynamic capture module is configured with a capture unit and a following unit. According to the smart street lamp control system based on the dynamic capture, the vehicle position is pre-judged in time dimension by vehicle speed identification and a road sequence relationship to realize early turn-on, so that the problem that the turn-on time of the corresponding street lamp misses the vehicle position due to relatively slow radar response in the prior art is solved.