The utility model provides a hot cold stoking exhaust apparatus of slag, includes that many exhaust branch, one -level are responsible for, the second grade is responsible for and the chimney, this exhaust branch and the interior intercommunication of the hot cold stoking of slag to the inward -remittance one -level is responsible for, and this one -level is responsible for and is responsible for and the chimney intercommunication through the second grade. This exhaust branch and one -level are responsible for and are the cell type pipe that comprises heat -resisting board, and its both sides and bottom are buried underground inside the concrete, and its top surface is the detachable apron, and this apron exposes. Compared with the prior art, the utility model discloses an exhaust branch and one -level are responsible for and all are equipped with the detachable apron, and the maintenance personal of being convenient for clears up the deposition, guarantee steam and smoothly discharge, prevent that steam pressure from crossing ambassador's pipeline breaking, improves the security of the vexed operation of slag heat. In addition, this exhaust branch and one -level are responsible for and are the cell type pipe that comprises heat -resisting board, are difficult for receiving heat altered to appear, and life is longer.