Floating feed suitable for mixed culture of bighead carp and prawn, and preparation method and application of floating feed

The invention belongs to the technical field of aquatic feed, and particularly relates to a floating feed suitable for mixed culture of bighead carp and prawn, and a preparation method and applicationof the floating feed. The floating feed suitable for mixed culture of bighead carp and prawn comprises a bighead carp feed and a prawn feed, wherein the bighead carp feed comprises the following components: fish meal, beer yeast powder, silkworm pupa powder, chlorella powder, soybean meal, rapeseed meal, flour, fish oil, vitamins, trace elements, casein, alpha-starch and pectin; and the prawn feed comprises the following components in parts by mass: fish meal, squid paste, shrimp bran, soybean meal, flour, rapeseed meal, silkworm pupa powder, fish oil, pectin, vitamins and trace elements. Thefloating feed can accelerate growth of prawn and bighead carp and achieve the effect of increasing weight. The floating feed can also reduce feed waste, protect water quality from being polluted andreduce diseases, so that co