A control method of a food waste treatment apparatus is disclosed. The method includes the action of connecting a discharge side of a grinder with a communication hole of a dehydrator. The method further includes the action of receiving the food waste. The method further includes the action of grinding the food waste. The method further includes the action of receiving the ground food waste. The method further includes the action of supplying a predetermined amount of wash water to a housing that includes the dehydrator. The method further includes the action of rinsing the ground food waste. The method further includes the action of discharging wash water. The method further includes the action of drying the ground food waste. The method further includes the action of discharging the dried ground food waste.