The invention relates to a flight command accuracy detection device which comprises a control box, a 50-meter infrared simulation target, a 200-meter infrared simulation target, a triangular support and a cable. The control box is connected with a vehicle-mounted launching guidance device. The control box comprises an embedded PC104 computer module, a video collection compression module, an isolation transformation module, an embedded micro control unit (MCU) data collection module, a lithium ion automatic charging and discharging power module, an alternating current (AC)-direct current (DC) power conversion module, a DC-DC power conversion module and a human-computer interaction module. The detection device can automatically collect and analyze data and video, detects and judges a control command of the launching guidance device and transmission accuracy of the control command, and evaluates launching process guidance accuracy of a weapon system by comprehensively processing the judgment data. The flight command accuracy detection device is good in comprehensiveness, and has high reliability and good maintenance, convenience and use performance.