Crayfish is an omnivore. Under natural conditions, it mainly eats organic debris, epiphytic algae, filamentous algae, roots, leaves and debris of aquatic plants, and especially likes green plants with rich juice, such as water hyacinth, water hyacinth, POTAMOGETON malayi, green duckweed and bitter grass. Animal food includes water earthworm, earthworm, eggs from aquatic insects, pupae, snails, mussels and fish. In the case of artificial breeding, compound feed, by-products of agricultural and sideline products processing (cakes, rice bran, bran, etc.), leftovers from slaughterhouses, and various tender grasses, melons and fruits, vegetable leaves, etc. can be fed.