The utility model provides a take fire grate segment closing device of pull rod, including compressing tightly the fire grate segment, still include pull rod, compression spring, fixing support and fixed rotating shaft, the head that compresses tightly the fire grate segment is pressed on the moving grate, the afterbody with the fixed rotating shaft links to each other, fixing support is fixed in and compresses tightly the fire grate segment below, the top of pull rod with compress tightly fire grate segment rotatable coupling, the bottom is passed in proper order fixing support and compression spring link to each other with the fastener, compression spring's one end is compressed tightly by fixing support, other end quilt the fastener compresses tightly. The utility model discloses a that adopts unique design compresses tightly mechanical structure such as fire grate segment, pull rod and compression spring, guarantee the siege when reverse motion, the back row fire grate segment compresses tightly front -seat fire grate segment all the time to reaching good leak protection sediment, leak protection wind and preventing the effect of toppling, installation and repair time can be shortened effectively in the use of T type pull rod, adjusting nut's design, the maintenance and the debugging of the equipment of being convenient for.