The invention discloses a small-sized prawn fishing net for a prawn culture pond. The small-sized prawn fishing net comprises a first support frame, a second support frame and a third support frame which are connected in sequence. A continuous protective screen is arranged on the outer sides of the first support frame, the second support frame and the third support frame. A tapered gathering net with the gradually decreased diameter is arranged on the inner side of each of the first support frame and the second support frame. A gathering net opening is formed in the middle of each gathering net, and faces the direction of the third support frame. A screening net is arranged on the inner circle of the first support frame. A screen inlet is arranged at one end, close to the first support frame, of the protective screen. A screen outlet is arranged at one end, close to the third support frame, of the protective screen. A prawn retaining net is arranged in the middle of the screen inlet. The small-sized prawn fishing net has the advantages that the structure is simple, the prawns are screened according to the size of the prawns, and the small-sized prawns are quickly fished out by thefishing net.