The invention relates to a salty mud ceramsite sintering furnace which comprises an opening and a barrel-shaped furnace body, wherein a furnace cavity for accommodating salty mud raw material nodules is formed in the furnace body. The outer wall of the furnace body is wrapped by a heat preservation material. A movable igniter is arranged at the top of the furnace body. The bottom end of the furnace body is welded with a cylindrical air box, and an induced air inlet is formed in the outer wall of the air box. The induced air inlet is connected with an air inducing device. Multiple vertical grate bars are arranged in the air box with the air box axis as the center, and the upper and lower ends of the grate bars are respectively connected with the upper and lower ends of the air box. A bottom cover is arranged at the bottom of the air box. By arranging the vertical grate bars, the movable bottom cover and an air retaining ring in the furnace cavity and performing air inducting in the tangential direction, the temperature in the furnace is balanced, sintering is even, and the purposes of improving the finished product rate and reducing environmental pollution are further achieved. In addition, the salty mud ceramsite sintering furnace has the advantages of being simple and reasonable in structure, convenient to operate and discharge, low in cost and the like and can be applied to the salty mud ceramsite or fly ash ceramsite sintering process.