The invention discloses a model airplane remote control system, belonging to the field of remote control equipment. The model airplane remote control system mainly comprises a crystal oscillator, a high-frequency circuit, a transmitting antenna, a power supply, a control lever, a variable potentiometer, an encoder, a switch circuit, a frequency selection circuit, a receiving antenna, a steering engine, a decoding circuit, and an amplifying circuit, and is characterized in that the control lever is connected with the variable potentiometer, the variable potentiometer is connected with a signalgenerator and the encoder, a signal generated by the encoder passes the switch circuit and then is carried on the high-frequency circuit, the crystal oscillator generates oscillation frequency, and finally, the transmitting antenna sends out the signal. The receiving antenna is connected with the frequency selection circuit, the frequency selection circuit is connected with the crystal oscillatorand the amplifying circuit, the frequency selection circuit selects and transmits a matched signal to the amplifying circuit, the amplifying circuit is connected with the decoding circuit, the signalis amplified and then is converted by the decoding circuit, and the decoding circuit is connected with the steering engine.