The invention relates to the field of dry quenching furnaces, in particular to a novel coke powder cooling device for a one-time deduster of a dry quenching furnace, which comprises cooling pipes, a water inlet distribution box, a water outlet header, a water inlet pipe and a water outlet pipe, wherein the upper ends of a plurality of groups of parallel cooling pipes are hung on the upper part of a machine shell, and the lower ends are free ends; the water inlet pipe is connected with the water inlet distribution box which is connected with the plurality of groups of cooling pipes; and the water outlet pipe is connected with the water outlet header. The novel coke powder cooling device has the advantages that: the cooling device overcomes the structural defect of a cooling sleeve, increases a cooling area by connecting a plurality of cooling pipes with water-cooling walls in parallel, improves the cooling efficiency, has large treatment capacity in a unit time, reduces maintenance workload, can be used reliably for a long time, and is particularly suitable for a large-scale dry quenching device.