The invention discloses a traffic flow detection control method, and the method comprises a traffic flow detection control system and a centimeter-level setting scheme. The traffic flow detection control system comprises a central control unit which is used for the regional traffic flow management; a local control unit which is used for the traffic flow management of a current road intersection; alane detection equipment module which is used for detecting a vehicle in a motor vehicle lane; a first wireless signal receiving and transmitting module which is used for receiving the data of the detection equipment module; and a wireless signal transmitting module which is used for transmitting a main unit control instruction. The method can achieve the coordinative control of the signal lampsand an LED prompt information display screen at each road intersection according to the traffic flow conditions of all roads, facilitates the control and guide, enables the vehicles to continuously move, avoids the frequent start/stop of the vehicles, improves the traffic efficiency of the roads, avoids the congestion of the roads, and avoids the potential safety hazards caused by the road scramble.