Separation fire grate atmospheric boiler

The utility model relates to a separation fire grate atmospheric boiler, the upper structure of which is the same with that of the common atmospheric boiler. The utility model also comprises a boiler grate, a wind chamber, a boiler arch, and a boiler chamber, wherein, the boiler grate is composed of an upper layer and a lower layer of boiler grates of which the connection is in an n-shaped structure; the upper part of the boiler grate is provided with the boiler arch in an H-shaped structure; the corresponding matching wind chamber is used for supplying wind; coal can be sufficiently burnt on the upper layer and the lower layer of boiler grates. The utility model effectively improves heat efficiency, keeps the good effect of smoke and dust elimination of the existing double-boiler grate boiler and has the characteristics of simple structure, low failure rate and easy maintenance.