The present invention relates to a solid-state anaerobic digestion apparatus using agitation and a screen wall. More specifically, the invention enables the use of solid livestock manure, which has previously been excluded from anaerobic digestion, as a feedstock for anaerobic digestion, thereby diversifying the treatment methods for solid livestock manure that has conventionally been handled almost exclusively by composting. It also enables the utilization of solid livestock manure as a bioenergy source, contributing to the promotion of biogas production in the livestock sector, and, by anaerobically digesting solid livestock manure, drastically reduces greenhouse gases originating from livestock manure so that additional income can be secured through carbon emissions trading. Accordingly, the present invention provides a solid-state anaerobic digestion apparatus employing agitation and a screen wall.