Computer case convenient to maintain

The computer case convenient to maintain comprises a bottom plate, an opening and closing side plate assembly, a front frame, a rear frame and a top plate, the opening and closing side plate assembly comprises a left side plate, a right side plate, a first connecting shaft and an adjusting plate, and the left side plate and the right side plate are arranged on the two sides of the bottom plate respectively and vertically extend upwards; the two adjusting plates are connected with one end of the left side plate and one end of the right side plate through first connecting shafts respectively and can rotate relative to the left side plate and the right side plate with the first connecting shafts as original points, and the other ends, away from the first connecting shafts, of the adjusting plates are provided with connecting platforms parallel to the bottom plate. The front frame and the rear frame are hinged to the front side and the rear side of the bottom plate through second connecting shafts respectively, a