A carrier phase-shifting method of multiple converters, comprising steps of: numbering the multiple converters as i+j ∗ N, wherein 1≤i≤N and 0≤ j≤M, N is a quantity of converters in a multi-converter system and N≥2, M is a multiplicity of the converter powered by one transformer, i is a serial-number of a transformer, and j is a serial-number of converter powered by one transformer; obtaining on-off status information of multiple converters; constructing a serial-number array according to numbers of the multiple converters, the serial-number array being a set of initial serial-numbers of the multiple converters arranged according to the numbers; moving elements in the serial-number array in real time based on on-off status of the multiple converters to form a dynamic serial-number for each converter that corresponds to a number of the converter; calculating a carrier initial phase angle of each converter according to the dynamic serial- number of each converter; performing carrier phase-shifting on each converter according to the carrier initial phase angle; and wherein the step of forming a dynamic serial-number for each converter that corresponds to a number of the converter further comprises: an initial serial-number of each multi-converter being the same as the number thereof, moving cyclically the elements in the serial-number array by one to a higher position from a k th element if a converter numbered k in the multiple converters stops working; and moving cyclically the elements in the serial-number array by one to a lower position from a k th element if a converter numbered k in the multiple converters starts working, wherein after the serial-number array is moved, the k th element is a dynamic serial-number of a converter numbered k. numbering the multiple converters as i+j ∗ N, wherein 1≤i≤N and 0≤ j≤M, N is a quantity of converters in a multi-converter system and N≥2, M is a multiplicity of the converter powered by one transformer, i is a serial-number of a transformer, and j is a serial-number of converter powered by one transformer; obtaining on-off status information of multiple converters; constructing a serial-number array according to numbers of the multiple converters, the serial-number array being a set of initial serial-numbers of the multiple converters arranged according to the numbers; moving elements in the serial-number array in real time based on on-off status of the multiple converters to form a dynamic serial-number for each converter that corresponds to a number of the converter; calculating a carrier initial phase angle of each converter according to the dynamic serial- number of each converter; performing carrier phase-shifting on each converter according to the carrier initial phase angle; and an initial serial-number of each multi-converter being the same as the number thereof, moving cyclically the elements in the serial-number array by one to a higher position from a k th element if a converter numbered k in the multiple converters stops working; and moving cyclically the elements in the serial-number array by one to a lower position from a k th element if a converter numbered k in the multiple converters starts working, wherein after the serial-number array is moved, the k th element is a dynamic serial-number of a converter numbered k.