Processing method for organic solid waste

The invention relates to a processing method for organic solid waste. The processing method comprises the following steps of: A, a step of processing raw materials, wherein the organic solid waste is ground to obtain ground materials; B, a step of naturally stacking and fermenting, wherein the ground materials are naturally stacked and fermented; C, a step of carrying out earthworms composting, wherein earthworms are added into the materials which are naturally stacked and fermented and in the process, leachate is generated; and D, a step of carrying out dry anaerobic fermentation, wherein the fermented materials are turned and stirred at regular intervals to obtain fermented biogas residues and in the process, leachate is generated. The invention also relates to a step (E) of carrying out high temperature aerobic fermentation after the step of carrying out the dry anaerobic fermentation, wherein the moisture content of the fermented biogas residues in the step (D) is regulated into a range in which the high temperature aerobic fermentation can be carried out so as to carry out the high temperature aerobic fermentation.