The invention discloses a signal processing and analyzing method suitable for an electrochemical transducer. The signal processing and analyzing method comprises the following steps that the sampling frequency of the electrochemical transducer is set, and the flow of gas entering the electrochemical transducer is regulated; the electrochemical transducer samples the gas entering the electrochemical transducer, and sampling data are converted into digital signals through analog-digital conversion; the digital signals are analyzed; when the process of converting the digital signals to be large from small reaches 1%, timing is started, integral operation is carried out on the digital signals for 1 min, and thus an integral operation result is obtained; the obtained integral operation result is compared with integral data of stored gas with known concentration, and thus the concentration of the gas with unknown concentration is obtained. The purpose of saving testing gas is achieved.