The invention relates to a selenium enrichment foliar fertilizer, which uses beer yeasts, allicin, fungus mushroom residues, fructan, allantoin, xylanase and barley as raw materials, wherein the barley are boiled by adding water through big fire after being baked, are sequentially boiled through low fire, barley residues are filtered out to obtain brewed liquid, the brewed liquid is cooled to room temperature, the beer yeasts are added into the brewed liquid to do primary fermentation, the xylanase and the fungus mushroom residues are added into primary fermentation liquid after the primary fermentation finishes, secondary fermentation liquid is obtained by filtering out the fungus mushroom residues through secondary fermentation, and the allicin, the fructan and the allantoin are added into the secondary fermentation liquid to be uniformly stirred, and are processed by instantaneously destroying enzymes and sterilizing in high temperature of 95 DEG C for 3 seconds at once, thereby obtaining the selenium enrichment foliar fertilizer.