The invention provides a solid fuel burner and a burning device, wherein the solid fuel burner includes a taper burning chamber with a big end opening and a small end opening, wherein the small end opening forms a feed port, and the big end opening forms a burning port. The burning chamber is configured in that the burning chamber (1) is tilted towards one side relative to the vertical direction, so that a stockpile outer surface (110) at a burning port area of the burning chamber forms a volatile component separation area (1101), a fixed carbon burning are (1102), and an ash area (1103) from top to bottom. The solid fuel burner and the burning device are suitable for burning the fuel with a low ash fusion point and can discharge ashes effectively and improve the burning efficiency.