The invention relates to a combustion furnace, in particular to a fire coal device capable of removing coal ash. The fire coal device can achieve the aim of effectively separating the coal ash from a coal stove hearth and comprises a coal stove with an internal combustion chamber, a coal outlet communicated with the internal combustion chamber of the coal stove is formed in the lower portion of the coal stove, and a screen plate is arranged on the coal outlet and provided with a plurality of fine holes. The fire coal device further comprises an impeller arranged above the screen plate and an impeller shaft arranged below the impeller, a driving device in transmission connection with the impeller shaft is arranged below the screen plate, blades are arranged on the impeller, and densely-distributed through holes are formed in the impeller. According to the fire coal device capable of removing the coal ash, the driving device drives the impeller to rotate through the impeller shaft; and through two times of ash discharging through the impeller and the screen plate, the coal ash is effectively discharged from the coal stove hearth, briquette burning is more sufficient, and the fire coal efficiency is greatly improved.