NOVELTY - A method and an apparatus for fermenting and drying food wastes by controlling the number of mixing, crushing and sending parts according to the processing amount are provided to serve high-quality livestock feed by treating a large amount of the food wastes effectively.    DETAILED DESCRIPTION - The method is characterized by the steps of: (i) mixing, crushing and sending the food wastes from one side bottom to the other side top of the fermenting and drying chamber and falling the wastes to the bottom of one side bottom of the chamber; (ii) mixing, crushing and sending the food wastes from one side bottom of an adjacent fermenting and drying chamber to the other side top and falling the wastes to one side bottom of the next chamber and repeating the waste falling process; (iii) repeating processes of dropping wastes falling from the last chamber to the rear one side bottom, mixing, crushing and sending the wastes backward from one side bottom to the other side top to be fallen to one side bottom of the next chamber, mixing, crushing and sending the wastes from one side bottom to the other side top of the next chamber and falling the wastes to one side bottom of the next chamber; and (iv) repeatedly performing falling processes of falling wastes dropping from the first chamber to one side bottom of the chamber and mixing, crushing and sending the wastes from one side bottom to the other side top to be fallen to one side bottom of the next chamber. The apparatus comprises at least one or more of fermenting and drying chamber(10) being connected with one after another and having a front and a rear mixing, crushing and sending parts(25,25') declining from a longitudinal one side bottom toward the other side top, a vertical falling hole formed at the top parts of the front and the rear mixing, crushing and sending parts of one side chamber and connected to the top ends of the front and the rear mixing, crushing and sending parts of the other side chamber, and a side mixing, crushing and sending part(35) between the outside width direction of the front and rear mixing, crushing and sending part for sending falling food wastes from the top falling part of the front and rear mixing, crushing and sending part to the bottom of the next mixing, crushing and sending parts.