Composite web forming machine with web bottom adsorption function

The utility model discloses a composite lapper with a net bottom adsorption function, which comprises a rack, a net curtain mechanism, a spunbond mechanism, a hot rolling mechanism and a stretching mechanism, the net curtain mechanism is arranged on the rack and comprises a net curtain frame and a plurality of bed boards laid on the net curtain frame, a net bottom air suction device is arranged below the net curtain mechanism, and the net bottom air suction device is connected with the spunbond mechanism. The net bottom air suction device comprises an air suction header pipe arranged in the length direction of the net bottom air suction device and a plurality of air suction branch pipe sets distributed at equal intervals in the length direction of the air suction header pipe, and the tail ends of the air suction branch pipe sets extend to the bed board. The structure of the net bottom air suction device is additionally arranged, so that the fiber layer can be effectively prevented from being influenced by air