The invention provides a racing track timing system based on a far-infrared tube pair. The racing track timing system based on the far-infrared tube pair comprises an order issuing device, a race starting detection device, a plurality of timing devices based on the tube pair, a synchronous timing device, a hand-held terminal and a power source module, wherein the order issuing device is used for issuing a starting order, the race starting detection device is used for detecting race starting reaction time and recording race starting time of athletes, the timing devices based on the tube pair are used for recording time that the athletes pass the timing devices, the synchronous timing device is used for resetting initial time of the above devices, and the hand-held terminal is used for receiving the race starting time, the reaction time and the time that the athletes pass the timing devices based on the tube pair and displaying movement data. The racing track timing system based on the far-infrared tube pair has the advantages that rapid alignment of the far infrared tube pair on two sides of a racing track can be achieved by an adjusting method of a five-degree-of-freedom rapid alignment platform, and through coordination of a pressure sensor module and a sound sensor module, the reaction time of the athletes can be measured accurately and rapidly; whether the athletes pass timing points or not is judged by the far-infrared tube pair, and wide racing track time, high precision in timing and good real-time performance can be achieved.