The present invention discloses a Pleurotus eryngii dry-crisp chip and a preparation method thereof. The Pleurotus eryngii dry-crisp chip is prepared with the following manufacturing process: precooking the Pleurotus eryngii, beating the precooked Pleurotus eryngii into slurry, seasoning the slurry, making dough, and finally pressing the dough into chips, followed by forming and baking. The preparation method breaks through the limits of making conventional Pleurotus eryngii foods, which not only preserves nutrition, dietary fiber and aroma of the Pleurotus eryngii, but also provides chewy-crisp taste and good palatability. In addition, the preparation method can meet the need for healthy, nutritious and delicious leisure foods, increase food varieties, and improve the utilization rate and the added value of the Pleurotus eryngii, with positive significance. The obtained Pleurotus eryngii dry-crisp chip is homogeneous in color (pale yellow), complete in appearance, strong in appetitefeeling, pure in flavor, appropriate in salinity, unique in Pleurotus eryngii aroma, caramel-aroma and crisp in mouthfeel and perfect in hardness and chewy. The Pleurotus eryngii dry-crisp chip is healthy leisure food good in color, fragrance, taste and nutrition, and is popular with the public.