A method for controlling a spin-drying cycle of a laundry treatment machine, the method comprising: performing a plurality of spin-drying operations (S200, S300, S400, S500) by rotating a drum (124; 224; 230) above an adjusted rotational speed range configured to adjust disposition of balls within a ball balancer (140a, 140b; 240a, 240b) so as to correspond to a change in an amount of eccentricity; and adjusting (S10, S20, S30) the disposition of the balls within the ball balancer (140a, 140b; 240a, 240b) by rotating the drum (124; 224; 230) within the adjusted rotational speed range, between the respective spin-drying operations (S200, S300, S400, S500), wherein the spin-drying operations comprise: a preliminary spin-drying operation performed by rotating the drum (124; 224; 230) within a RPM range of a resonance point of a cabinet (111; 211) or lower; and a main spin-drying operation (S300, S400, S500) performed by rotating the drum (124; 224; 230) within an RPM range of above the resonance point of the cabinet (111; 211), wherein the disposition of the balls within the ball balancer (140a, 140b; 240a, 240b) is adjusted by rotating the drum (124; 224; 230) within the adjusted rotational speed range, between the preliminary spin-drying operation and the main spin-drying operation (S300, S400, S500); characterized in that, the main spin-drying operation (S300, S400, S500) comprises: increasing (S410, S510) the rotational speed of the drum (124; 224; 230) to a maximum rotational speed (M1, M2, M3); and decreasing (S430, S530) the rotational speed of the drum (124; 224; 230) from the maximum rotational speed (M1, M2, M3), wherein the decreasing the rotational speed of the drum (124; 224; 230) comprises a ball disposition maintenance section (S1, S2, S3) configured to prevent excessive vibration of the cabinet (111; 211) occurring during a process of decreasing the rotational speed of the drum (124; 224; 230). performing a plurality of spin-drying operations (S200, S300, S400, S500) by rotating a drum (124; 224; 230) above an adjusted rotational speed range configured to adjust disposition of balls within a ball balancer (140a, 140b; 240a, 240b) so as to correspond to a change in an amount of eccentricity; and adjusting (S10, S20, S30) the disposition of the balls within the ball balancer (140a, 140b; 240a, 240b) by rotating the drum (124; 224; 230) within the adjusted rotational speed range, between the respective spin-drying operations (S200, S300, S400, S500), wherein the spin-drying operations comprise: a preliminary spin-drying operation performed by rotating the drum (124; 224; 230) within a RPM range of a resonance point of a cabinet (111; 211) or lower; and a main spin-drying operation (S300, S400, S500) performed by rotating the drum (124; 224; 230) within an RPM range of above the resonance point of the cabinet (111; 211), wherein the disposition of the balls within the ball balancer (140a, 140b; 240a, 240b) is adjusted by rotating the drum (124; 224; 230) within the adjusted rotational speed range, between the preliminary spin-drying operation and the main spin-drying operation (S300, S400, S500); characterized in that, the main spin-drying operation (S300, S400, S500) comprises: increasing (S410, S510) the rotational speed of the drum (124; 224; 230) to a maximum rotational speed (M1, M2, M3); and decreasing (S430, S530) the rotational speed of the drum (124; 224; 230) from the maximum rotational speed (M1, M2, M3), wherein the decreasing the rotational speed of the drum (124; 224; 230) comprises a ball disposition maintenance section (S1, S2, S3) configured to prevent excessive vibration of the cabinet (111; 211) occurring during a process of decreasing the rotational speed of the drum (124; 224; 230). a preliminary spin-drying operation performed by rotating the drum (124; 224; 230) within a RPM range of a resonance point of a cabinet (111; 211) or lower; and a main spin-drying operation (S300, S400, S500) performed by rotating the drum (124; 224; 230) within an RPM range of above the resonance point of the cabinet (111; 211), wherein the disposition of the balls within the ball balancer (140a, 140b; 240a, 240b) is adjusted by rotating the drum (124; 224; 230) within the adjusted rotational speed range, between the preliminary spin-drying operation and the main spin-drying operation (S300, S400, S500); characterized in that, the main spin-drying operation (S300, S400, S500) comprises: increasing (S410, S510) the rotational speed of the drum (124; 224; 230) to a maximum rotational speed (M1, M2, M3); and decreasing (S430, S530) the rotational speed of the drum (124; 224; 230) from the maximum rotational speed (M1, M2, M3), wherein the decreasing the rotational speed of the drum (124; 224; 230) comprises a ball disposition maintenance section (S1, S2, S3) configured to prevent excessive vibration of the cabinet (111; 211) occurring during a process of decreasing the rotational speed of the drum (124; 224; 230). increasing (S410, S510) the rotational speed of the drum (124; 224; 230) to a maximum rotational speed (M1, M2, M3); and decreasing (S430, S530) the rotational speed of the drum (124; 224; 230) from the maximum rotational speed (M1, M2, M3), wherein the decreasing the rotational speed of the drum (124; 224; 230) comprises a ball disposition maintenance section (S1, S2, S3) configured to prevent excessive vibration of the cabinet (111; 211) occurring during a process of decreasing the rotational speed of the drum (124; 224; 230).