Compound 6-fluoro-3,4-dihydro-2-(oxirane-2-yl)-2H-chromene, the key intermediate of nebivolol, was synthesized from 6-fluoro-3,4-dihydro-2H-chromene-2-carboxylic acid via esterification, Ylide reaction, halogenation, reduction and cycloaddition with an overall yield of 70%.