NOVELTY - Sub-critical water is used for treatment of urban-rural organic solid waste to produce organic fertilizer by removing impurities in organic solid waste, crushing separated organic solid waste, and adding auxiliary materials; putting the material to be treated into a sub-critical water device; employing an intelligent control method, performing sequencing batch organic solid waste treatment with sub-critical water in main reactors and accumulator stills; and preparing the treated products into ordinary organic fertilizers, biological organic fertilizers, or organic and inorganic fertilizers.    USE - Sub-critical water used for treating urban-rural organic solid waste to produce organic fertilizer (claimed).    ADVANTAGE - The sub-critical water provides intelligent control and safe performance, and is energy-saving and environment-friendly, and can provide fertilizers having high activity and a quick and long acting performance.    DETAILED DESCRIPTION - Sub-critical water is used for treatment of urban-rural organic solid waste to produce organic fertilizer, which comprises:    (A) separating and removing impurities in organic solid waste, crushing separated organic solid waste, and adding auxiliary materials;    (B) putting the material to be treated into a sub-critical water device; employing an intelligent control method, performing sequencing batch organic solid waste treatment with sub-critical water in main reactors and accumulator stills which are connected with each other in parallel, so as to obtain treated products; and    (C) preparing the treated products into ordinary organic fertilizers, biological organic fertilizers according to need, or into organic and inorganic fertilizers according to different soils and crop conditions.    An INDEPENDENT CLAIM is included for a sub-critical water treatment device comprising spiral conveyer respectively connected with inlet valves of two main reactors. Air outlet valves of two main reactors are respectively connected with air inlet valves of an accumulator still. A steam generating device is respectively connected with the air inlet valves of two main reactors in parallel. A hot medium generating device is respectively in parallel connection with heating jackets externally arranged on the main reactors. Air outlet valve of the accumulator still is sequentially connected with a deodorizing device and a dust-extraction device. An intelligent control platform for controlling intelligent sequencing batch reaction is respectively connected with the spiral conveyer, and the two main reactors, the accumulator still, the steam generating device and the hot medium generating device.