A control method of a pasteurizing machine (1), which comprises, in sequence, the steps of actuating a water feeding line (17) so as to pour a predetermined amount of water, less than 50% of the nominal capacity of the processing tank (4), into the processing tank (4); and of actuating, for a predetermined washing time, comprised between 1 and 10 minutes, the motor assembly (13) so as to drive into rotation the rotatable member (12, 112) about the longitudinal axis of the tank (A) at a first predetermined angular speed, the value of which is higher than 75% of the maximum angular speed reached during the milk pasteurization process, so as to splash water onto the side walls of said processing tank (4).
