The invention provides a material bin with an automatic cleaning function. The material bin comprises a bin body, air introducing equipment and water introducing equipment which are mounted on the bin body, wherein the water introducing equipment adopt two rows of horizontal pipes; the air introducing equipment adopt vertical pipes; the distance between the two rows of horizontal pipes is 20-150 mm; the diameter of each of the air introducing equipment and the water introducing equipment is 10-300 mm; the water introducing equipment is filled with a cleaning solution; and the cleaning solution comprises the following components in parts by weight: 4-10 parts of diethanol amine, 6-15 parts of butyl cellosolve, 8-10 parts of ethyl alcohol, 4-12 parts of epichlorohydrin, 5-20 parts of urea, 3.2-4.5 parts of an adsorbent and 3.5-5.7 parts of deionized water. According to the material bin with the automatic cleaning function, the water introducing equipment and the air introducing equipment are utilized to clean and blow-dry the inner wall of the bin body, the interference produced by the previous materials on the next materials is avoided, and the rate of finished products is improved.