The invention provides a flow sensor detection platform and a control method thereof. The detection platform comprises a fluid circulating system, a flow control system, and a test analysis system. The fluid circulating system comprises a water tank, a water pump, a motor, and a water conveying pipeline. The water conveying pipeline comprises a water main, a return main, and test tube rows. The test tube rows are provided with ultrasonic flowmeters, and are provided with connecting holes of to-be-measured flow sensors, and flange interfaces. The flow control system comprises a local control unit and a remote control unit. The remote control unit communicates with the local control unit, and the remote control unit is used to control constant-voltage current supply of a motor. The test analysis system comprises a multi-channel signal acquisition instrument and a signal analyzer. The multi-channel signal acquisition instrument acquires flow signals of the test tube rows through the ultrasonic flowmeters. The signal analyzer compares the output signals of the to-be-measured flow sensors with the flow signals of the test tube rows, and outputs a detection result. The flow sensor detection platform is simple in operation, convenient in control, low in cost, and accurate in measurement.