The utility model provides an air microorganism sampler clamping platform for poultry farming. The device comprises a fixed seat, a gravity block is vertically mounted in the fixed seat in a sliding manner; three vertical racks are arranged on the outer side wall of the lower end of the gravity block; each vertical rack is engaged with a first gear; a torsion spring is mounted on a rotating shaftof each first gear; three sliding blocks which are horizontally arranged are further mounted in the first mounting cavity in a sliding manner; a horizontal rack is arranged at the bottom of one end ofeach sliding block; a clamping seat is arranged at the other end of each sliding block; a clamping protection pad is arranged on the side wall of each clamping seat; a mounting seat is arranged at the bottom of the fixed seat; a lifting seat is slidably mounted in the mounting seat through a lifting device, three supporting legs are evenly hinged to the bottom of the mounting seat, a balancing device is arranged at the lower end of each supporting leg, and the air sampler has the advantages of being capable of freely adjusting the height, rapid and convenient to disassemble and assemble, highin use safety, wide in application range and easy and convenient to operate.