A control method of a multi-drum washing machine comprising at least two sets of mutually connected washing devices, comprising a step of setting an oscillating program in the multi-drum washing machine, characterized in that the oscillating program oscillation generated by at least one second washing device is used as an oscillating source to drive washing water and laundries in at least one w first washing device to generate an interaction with each other for washing, so that when the at least one second washing device oscillates, the at least one first washing device and washing water and laundries therein are driven to oscillate, and a function of soft washing of the laundries is realized by the vibration or jumping of the washing water therein, wherein the control method further comprises a step of detecting oscillation information of the at least one second washing device serving as the oscillation source in operation, a step of judging whether the at least one first washing device executes the oscillating program according to the oscillation information, and a step of performing oscillating washing by cooperation with the at least one second washing device; or the control method further comprises a step of setting the oscillation information corresponding to the at least one second washing device executing the oscillating program and serving as the oscillating source, and a step of controlling the at least one first washing device to cooperate with the at least one second washing device to perform the oscillating washing, wherein said oscillation information comprises washing progress information and/or rotating speed information of a drum in the at least one first washing device or the at least one second washing device characterized in that the oscillating program oscillation generated by at least one second washing device is used as an oscillating source to drive washing water and laundries in at least one w first washing device to generate an interaction with each other for washing, so that when the at least one second washing device oscillates, the at least one first washing device and washing water and laundries therein are driven to oscillate, and a function of soft washing of the laundries is realized by the vibration or jumping of the washing water therein, wherein the control method further comprises a step of detecting oscillation information of the at least one second washing device serving as the oscillation source in operation, a step of judging whether the at least one first washing device executes the oscillating program according to the oscillation information, and a step of performing oscillating washing by cooperation with the at least one second washing device; or the control method further comprises a step of setting the oscillation information corresponding to the at least one second washing device executing the oscillating program and serving as the oscillating source, and a step of controlling the at least one first washing device to cooperate with the at least one second washing device to perform the oscillating washing, wherein said oscillation information comprises washing progress information and/or rotating speed information of a drum in the at least one first washing device or the at least one second washing device