The invention discloses a feed additive for a laying hen. The feed additive for the laying hen comprises the following raw materials of malt, bean pulp, corn, salt, a shell powder, a pine needle meal,a compound amino acid powder, a pine bark extract, a grapeseed extract, celery, a lettuce and fructus forsythia. The invention further discloses a preparation method of the feed additive for the laying hen. The feed additive for the laying hen takes the natural plants or extracts of the natural plants like the malt, the bean pulp, the corn, the pine needle meal, the pine bark extract, the grapeseed extract, the celery, the lettuce and the fructus forsythia as the raw materials, the addition of chemicalsynthetic drugs, hormones and antibiotics is avoided effectively, the content of the heavy metal is low, the eating safety of an egg laid by the laying hen is guaranteed, the feed additive is green and pollution-free, meanwhile, the feed additive has the advantage of high laying rate, the requirement of people on healthy diet is met, and the feed additive has a broad market prospect.