The invention discloses a processing method for grilled steak. The method comprises the following steps of: injecting material water after material sorting, defreezing and trimming, wherein the water injection rate is 20%; standing and curing for 24 hours; quickly freezing, wherein the center temperature of the quickly-frozen steak is -2 DEG C and the surface temperature is -8 DEG C; slicing and grilling, wherein the slice thickness is 18-20 mm, the weight is 200 grams, and the grilling temperature is 140-160 DEG C. The steak grilled by the invention has multiple flavors and tastes fresh, tender and succulent. The invention has the advantages of novel technique, unique effect, being suitable for industrial production, and the like.