The invention belongs to the technical field of thermal conversion and utilization of powdered coal, and particularly relates to a recovery and purification process for coking chemical products. The process includes separating products obtained by dry coal coking in a separation system; collecting a coking chemical gas product obtained; feeding the collected gas product to a primary cooler to remove naphthalene; subjecting obtained tar, oil dregs and ammonia water to centrifugal separation in a centrifuge; and feeding the gas product to a desulfurizer that is ferric hydroxide to perform dry desulfurization of the gas product. The separation system includes first column bodies, second column bodies, first supporting feet, hooks, a feeding pipe, a liquid even distribution mechanisms, primaryfiltration units, power units and dust filters. When the system is in use, ammonia water is fed to the feeding pipe, is evenly sprayed to the inside of the first column body through the liquid even distribution mechanism connected to the feeding pipe and then flows into the second column body, thus achieving cleaning and separation of the products obtained by dry coal coking.