The invention discloses a cleaning technology for extracting vanadium from vanadium containing materials through sodium salt roasting. Sodium chloride is added in the vanadium containing material orefor uniform mixing and fine grinding, nodulizing roasting is conducted, after harmful gases in roasting smoke are removed through an adsorbent, the roasting smoke reaches the standard to be exhausted,obtained roasted ore is subjected to water leaching and then subjected to alkaline leaching, and water is added in the roasted ore for leaching; a water leaching solution and water leaching residuesare obtained through filtration, a sodium carbonate salt solution is added in the water leaching residues for leaching, and an alkaline leaching solution and leaching residues are obtained through filtration; calcium chloride is added in the water leaching solution to deposit enriched vanadium, and calcium vanadate filter cakes and a molybdenum precipitation liquid are obtained through filtration;the molybdenum precipitation liquid returns to the roasted ore water leaching procedure or vanadium containing material ore mixing or nodulizing procedure to be circularly used, the obtained calciumvanadate filter cakes are decomposed through the alkaline leaching solution, and calcium carbonate and vanadium enriching liquid are obtained through filtration; after calcium carbonate is roasted andconverted into calcium oxide, the calcium oxide returns to the high-temperature smoke purification procedure to be continuously used; ammonium salt is added in the vanadium enriching liquid, vanadiumis separated by crystallization, and ammonium metavanadate and crystallization mother liquor thereof are obtained through filtration, the ammonium metavanadate is subjected to pyrolysis, a vanadium pentoxide product is obtained, the crystallization mother liquor directly returns to the alkaline leaching procedure, or after calcium is added for vanadium depositing, the crystallization mother liquor returns to the alkaline leaching procedure to be circularly used. Cyclic utilization of sodium chloride, lime, sodium carbonate salt and water in the technology process is achieved, and the beneficial effects that the technology is simple, the vanadium recycling rate is high, the production cost is low, and cleanliness and environment friendliness are achieved are achieved.