Simulation detection circuit and method for engine control circuit

The invention relates to a simulation detection circuit and method for an engine control circuit. The simulation detection circuit comprises a main chip circuit, a voltage division circuit, a voltagecomparison circuit, an opto-coupler isolation circuit and a digital tube circuit; and the voltage division circuit is used for being connected to the voltage comparison circuit to convert input enginesignals into signals capable of being recognized by a single chip microcomputer, the opto-coupler isolation circuit is used for reducing voltage interference, and the digital tube circuit is used fordisplaying the detection steps. According to the simulation detection circuit, the original mode that various signals of the engine start process are visually detected by human is replaced, it is guaranteed that the engine detection work is simulated before an engine is installed, a guarantee is provided for discovering airplane problems in advance, a large amount of manpower and time is saved, and the working efficiency i