The utility model discloses a novel main combustion furnace pry used for sulfur recovery. The novel main combustion furnace pry comprises a main combustor, a main combustion furnace and an instrument control cabinet, wherein the main combustor and the instrument control cabinet are installed on a base of the main combustor; the instrument control cabinet is connected with a burning torch through a control cable; the left end of the main combustor is provided with a fuel gas inlet that is connected with a fuel gas pipeline; the main combustor is also provided with an air inlet and an acid gas inlet; and the main combustion furnace is provided with a pyroprocess gas outlet. The advantages are as follows: the integration of the main combustor, the main combustion furnace, a process pipe and the control instrument is realized by adopting prying or complete technology; the technical difficulties caused by split production and construction of the main combustion furnace are solved; and meanwhile, cold protective air flow is led into the inner ring wall of a combustion chamber of the main combustor to separate the high temperature gas in a combustion area from the lining material on the ring wall of the combustion chamber, so that the working temperature of the lining material on the ring wall is greatly reduced, thus achieving the effect of protecting the lining material.