Abstract: This paper tries to introduce temporal network into the study of disinformation propagation, and proposes a method to explore the propagation mechanism of disinformation by carving the propagation network through Temporal Motif, which integrates the structural characteristics of the propagation network and the temporal properties of information, and also uses several real data sets to test the generalizability of the method in disinformation detection. Based on the results of empirical data, it is shown that the change patterns of true and false information are different at different time scales Temporal Motif, and false information spreads faster and deeper than true information at large time scales, and false information can be detected more accurately using the method based on the temporal modal degree. This study reveals the multi-timescale propagation mechanism of false information, which can be used to prevent the propagation of false information.