The utility model relates to a coal storage device, in particular to an energy-saving and environmental protection underground coal storage bunker. The utility model solves the problems of the existing coal storage device as large occupation space, water resources waste and higher building and use cost. The utility model comprises at least a coal storage bunker. Wherein, the coal storage bunker is composed of a bunker wall and a bunker bottom; a coal unloading port is opened on the bunker bottom; base legs are provided below the bunker wall on both sides and are fixed on the foundation; the bunker bottom, base leg and the foundation form a coal transportation passage. The utility model also comprises a lifting bunker arranged on one side of the coal storage bunker. The lower part of the lifting bunker is communicated with the coal transportation passage below the coal storage bunker. The utility model effectively utilizes the space under the coal yard ground and makes the working environment on the coal yard ground improved. The utility model is loaded and unloaded in the fully-closed type and does not need the dusting and sprinkling device, which saves the water resources and effectively prevents the production of dust. In addition, the utility model has low cost and small quantities and can store different coals separately, which completely meet the national environmental protection demands in use and is suitable for popularization of the coaling station and the coal mine.