The invention discloses a heating control method for a multi-drum washing machine.The washing machine at least comprises a first washing drum with a first heater and a second washing drum with a second heater.Before the first washing drum executes a heating program, whether needed heating time is too long or not is judged; if not, the first washing drum executes the heating program preferentially; if yes, whether the second washing drum is executing any one of a heating program, a dewatering program and a drying program or not is judged; if yes, the first washing drum suspends execution of the heating program, and executes the heating program after the second washing drum completes execution of the heating program; if not, the first washing drum executes the heating program directly.By means of the method, the first washing drum executes the heating program preferentially so that clothes, badly needing to be washed, of a user can be washed preferentially, and waiting time of the user can be shortened.Meanwhile, the heating control method is simple, reliable, significant in effect and suitable for application and popularization.