The invention belongs to the technical field of application of decoction dregs, and relates to a method for applying minor pinellia ternate decoction dregs to cultivating functional crops. Effects of relieving and inhibiting emesis can be realized by the cultivated crops such as grain, fruits and vegetables. The method particularly includes adding fresh water into Chinese herbal medicines or the decoction dregs of minor pinellia ternate decoction formulas to soak the Chinese herbal medicines or the decoction dregs, heating and decocting the Chinese herbal medicines or the decoction dregs, filtering the Chinese herbal medicines or the decoction dregs, uniformly mixing decocted filter liquor obtained in two procedures with each other for standby application, collecting the decoction dregs and then manufacturing decoction dreg cakes for standby application; diluting the uniformly mixed filter liquor, then soaking crop seeds in the filter liquor, sowing the seeds, irrigating and managing the seeds according to conventional technologies, applying the smashed decoction dreg cakes to the crops in growth stages, flowering stages and / or fruit bearing stages of the crops until the crops with anti-emetic medicinal properties are harvested in mature stages. The method has the advantages of simplicity and convenience in operation, easily available raw materials, environmental protection, zero pollution, hazards or additives, safety and reliability.