The invention discloses a converter dry dedusting coarse ash collecting device, and relates to the technical field of converter dry dedusting. The converter dry dedusting coarse ash collecting device comprises an ash bucket connected with a cooler; an ash unloading valve is mounted in an outlet of the ash bucket, and is connected with a feed end of a bucket elevator through an ash discharge pipe; a discharge end of the bucket elevator is connected with an ash storage bin in a high place through a connecting pipe; the ash bucket includes a conical bucket body; and an ash bucket cover plate and an ash inlet pipe connected with the cooler are mounted above the conical bucket body. Compared with the prior art, coarse ash collected by the ash bucket is fed in the bucket elevator through the ash unloading valve, and enters the ash storage bin after vertical hoisting to prevent accumulation on the ground to cause loss and environmental pollution; and an ash scraping machine is not needed for ash scraping to reduce the maintenance cost.