The present invention relates to a method and apparatus for controlling bleeder connected to phase-cut dimmer, wherein the method includes: determining a first time period when the input voltage is lower than a predetermined reference voltage using at least one preceding input voltage cycle; opening bleeder in the first time period in a subsequent input voltage cycle; closing bleeder in a second time period, wherein the second time period equals to the input voltage cycle minus updated first time period, wherein the updated first time period equals to a sum of the first time period and a predetermined advancing time period; and repeating the steps of opening and closing the bleeder using the updated first time period. The present invention is capable of controlling bleeder connected to phase-cut bleeder without distinguishing the dimming types from Triac to Trail, thereby simplifying process and reducing calculation.