A food waste disposal apparatus decomposing organic waste by inputting microbes during a process of drying the food waste, characterized in that the food waste disposal apparatus comprises a mixing basin installed in a housing, and a rotational shaft with a plurality of mixing blades, in which a hot water tank is installed near the mixing basin for heating the mixing basin, microbes in a microbe tank are sprayed into the mixing basin in order to enhance the efficiency of decomposition of food waste, a drain water tank with a drain pipe is provided under the mixing basin for collecting and discharging waste water, and a cleansing device installed in the drain water tank for cleansing an inner space of the drain water tank, and a control touch panel, in which functions for operation are set is installed, so that the functions can be selected in a touching manner.