The invention discloses a cushion protection type carbon dioxide detection system based on noise elimination. The cushion protection type carbon dioxide detection system is characterized by mainly comprising a carbon dioxide sensor H, an amplifier P1, an amplifier P2, a triode VT1, a display and a capacitor C1 of which the positive pole is connected with the collector electrode of the triode VT1 and the negative pole is grounded. The cushion protection type carbon dioxide detection system based on noise elimination can acquire a signal of the concentration of carbon dioxide in the environmentand filter an interference signal in the signal, so that a detected signal is cleaner. Meanwhile, the cushion protection type carbon dioxide detection system based on noise elimination can amplify thedetected signal and improve the amplitude of the detected signal, so that the concentration of carbon dioxide in the environment can be accurately detected. The cushion protection type carbon dioxidedetection system based on noise elimination has a temperature compensation function and can compensate for errors caused by environmental temperature changes, so that the concentration of carbon dioxide can be detected more accurately.