The invention provides a method for processing ready-to-eat leisure food by use of pleurotus eryngii head, belonging to the field of deep processing of agricultural products. The method increases the varieties of the ready-to-eat leisure food on the market, and improves the utilization rate of the homogeneous non-commercial leftovers of the pleurotus eryngii in industrial production. According tothe invention, about 20% of the byproduct pleurotus eryngii head can be generated according to the pleurotus eryngii cultivated industrially; and the pleurotus eryngii head has the characteristics ofrich nutrition, cleanness and sanitation, crispy and tender texture and the like, and is suitable to be processed into ready-to-eat leisure food. The processing flow of the ready-to-eat leisure pleurotus eryngii head sequentially comprises the steps of: preparation of pleurotus eryngii head, cleaning, slitting, boiling, draining, baking, vacuum packing, and two-section low-temperature sterilization to obtain the finished product. According to the invention, the product has crispy and tender texture, does not contain oil and preservative, can maintain the inherent nutritional ingredients, flavor and color of pleurotus eryngii, is convenient to carry and can be used as ready-to-eat leisure food.