In this paper, organocascade triple reaction that catalyzed by small organic molecules have been developed and successfully accessed to the highly functional diastereoselective tricyclic chromane.The reaction between that cinnamaldehyde combine with phenylsulfonamide and 1,3-dione skeleton and caesium carbonate via 1,6-/acetalization/1,4- addition triple cascade reaction to generate highly functionalized tricyclic and construct four stereocenters in simultaneously. The tricyclic products have been obtained good yields ( up to 99% ) and excellent diastereoselectivities ( up to > 20:1 dr ). The relatived configuration of the cyclized product was determined by the single crystal X-ray analysis.