A method for processing and displaying an intracavity electrocardiography signal and a temporary cardiac pacemaker. The method includes acquiring an intracavity electrocardiography signal； pre-processing the intracavity electrocardiography signal； storing the pre-processed intracavity electrocardiography signal in real time； detecting whether a pacing parameter adjustment instruction is triggered, and if so, calling and displaying the signal stored in real time on a pacing parameter adjustment interface on the same screen. After the intracavity electrocardiography signal is acquired, a temporary cardiac pacemaker carries out a series of processing on the electrocardiography signal, and gives a display response according to a selection. When display is carried out, a real-time continuous signal or a waveform signal, with more detailed information, of a single electrocardiography event can be displayed, and the current perception sensitivity can also be simultaneously indicated, facilitating rapid determination and adjustment of corresponding parameters by a user.
