Roasting device of carbon product

The invention relates to a roasting device of a carbon product, which can solve the problems of random control of heating curve and improving energy utilization rate and production efficiency. The structure of the roasting device is that: a fire path wall is arranged above a furnace bottom so as to form a furnace box with an end wall; fillers are arranged on the periphery of a carbon product roasting component in the furnace box; the fire path wall comprises a wall body; a separating wall is arranged in the wall body so as to form curved snake-shaped combustion paths; burners which communicate with the combustion path are respectively arranged at the two sides of the upper end wall; heat retainers are respectively arranged on the outlets of the combustion paths on the two sides; the outlets of the combustion paths on the two sides are connected with a reversing valve through a pipeline; an air inlet and a fuel gas outlet are formed in the reversing valve; and a valve plate which can rotatably control the gas