Disclosed is a USB-Flexray bus adapter based on a microprocessor, including a USB interface connected with a PC and a Flexray bus interface connected with the Flexray bus network; the microprocessor is connected with the USB interface and the Flexray bus interface through a USB communication control circuit and a Flexray communication control circuit to realize the data transmission from the Flexray bus to the PC. In the USB-Flexray bus adapter based on the microprocessor, the microprocessor controls the data to be transmitted between the Flexray bus and the USB interface so that the data acquisition problem of the Flexray bus network is solved and a device used for researching the Flexray network is provided.