The utility model relates to a soaking carbon product roasting furnace, which comprises a furnace body and a furnace cover, wherein two side walls of the furnace body are flame path walls; a flame path with a winding structure is arranged in each side wall; and a vertically standing metal sagger is arranged in the furnace body. The heat transfer of the furnace in a roasting process is carried out through a way integrating radiation, convection, conduction and infrared wavelength; a product is heat uniformly, and the heat utilization rate is high. The product is placed in the sagger through a special production line, so that the sagger placing with higher mechanization can be realized. No fillers is added in a furnace box, so that the loss of the furnace box is less, and only heat change exists without loss of mechanical furnance-charging/discharging. The maximum temperature in the roasting process is lower than a traditional roasting temperature, the heat loss is small, and the service life of refractory matters of the furnace body is long.