Based on the unique advantage of the variational nonlinear chirp mode decomposition,a multi-fault diagnosis method of rolling bearing was proposed.The instantaneous frequencies and amplitudes of multi fault vibration signals of rolling bearing were estimated; on this basis,the fault signal was reconstructed by minimizing the signal bandwidth.The proposed method had been compared with variational mode decomposition; the proposed method was verified through an experimental case.The results show that the proposed method is obviously superior to the variational mode decomposition method,even under the background of strong noise,by using the proposed method,the multi fault signals of rolling bearing also can be effectively decomposed and reconstructed,and the fault characteristics of rolling bearing with multi fault can be effectively diagnosed.