Abstract: In this paper, based on the observation data of the SWARM satellites, the disturbance of magnetic field and plasma recorded by two satellites are extracted and studied by differential, Fourier analysis, Wavelet transform and other algorithms. The ionospheric disturbance and its propagation process caused by the disintegration of the No.1402 typhoon "Kajiki" formed on January 29, 2014 are studied. The results show that the generation of the disturbing signal is sudden and instantaneous, which has a good correspondence with the disintegration of the typhoon in time and space; the disturbance appears in all parameters, and the plasma disturbance is earlier than the magnet; the disturbance of the magnetic field has a prominent dominant frequency and frequency shift; during the northward propagation of the abnormal signal, there is a sudden attenuation and deceleration near 40°N. The analysis shows that the disintegration of the typhoon can generate acoustic gravity wave or infrasound wave, and generate some disturbance to the magnetic field and plasma in the ionosphere.