The invention discloses a bypass adapter and a rapid prototyping control method of an aeroengine based on the bypass adapter and the adapter comprises a DSP nucleus module, a signal driving module and a signal conditioning module. The rapid prototyping control method employs the bypass adapter and a general PC mechanism to form a rapid prototyping control system, wherein the PC controls as an engine control computer, and the bypass adapter realizes the communication with the engine control computer in a mode of high-speed serial communication, and, as a terminal device of an engine controller and in a bypass operation mode, realizes the conditioning and collection of sensor signals and controls the output and drive of the signals, with the data transmission of the adapter adopting a host / slave real-time logic. The bypass adapter and the rapid prototyping control method of the aeroengine are easy to use, and have strong anti-interference capability and strong real-time capability.