The invention discloses a test board for a servo mechanism controller based on a USB (Universal Serial Bus) interface. The test board comprises a USB interface extension module, a CAN (Controller Area Network) communication module and an AD (Analog/Digital) acquisition module, wherein the test board for the servo mechanism controller based on the USB interface adopts the USB interface extension module to rapidly send and receive multi-channel data under the control of an upper computer, and the CAN communication module and the AD acquisition module conduct reliable data communication and rapid data acquisition and test a type of single machine. According to the test board for the servo mechanism controller based on the USB interface, due to rapid transmission of the USB parallel interface and high speed information acquisition of an AD acquisition circuit, the test performance and test speed are improved and increased effectively, and the reliability and coverage of testing an aerospace type of single machine are improved and expanded greatly.