The invention relates to an ibuprofen arginine granule, which is composed of ibuprofen arginine, a filler, a taste masking agent, an adhesive, a flavoring agent, a smelling agent, and a coloring agent by weight part. The invention also provides a preparation method of the ibuprofen arginine granule. The ibuprofen arginine granule provided by the invention covers up the intrinsic spicy taste of ibuprofen arginine, and has the advantages of good children compliance, fast effect, simple prescription composition, easily available and cheap auxiliary materials with fewer variety and dosage, and no need of coating. The preparation method has the characteristics of simple process, easy operation, no need for special equipment, short production cycle, and low cost, thus being suitable for industrialized production.