A rotor suspension-type wide range spray bar sprayer and a control method therefor, the sprayer comprising a sprayer body (1), a pair of polygonal drums (2) being installed on the sprayer body (1), and a rotor wide range spray bar (3) being disposed on the polygonal drums (2) and being located on both sides of the sprayer body (1) after unfolding； the rotor wide range spray bar (3) comprises a motor (32), a propeller (33) connected to the motor (32), a connected multi-section rotor spray bar unit (31) and a plurality of nozzles (34) provided on the rotor wide-with spray bar (3)； the polygonal drums (2) are used to unfold and fold the rotor wide range spray bar (3)； a self-balancing height setting system (4) is provided on the rotor wide range spray bar (3) and is used for obtaining height information and regulating the balancing and ground clearance of the spray bar； the sprayer body (1) is equipped thereon with a main control system (5) connected to the polygonal drums (2), the motor (32) and the self-balancing height setting system (4). The described sprayer can ensure the horizontal state of the wide range spray bar in various postures of the machine body, and prevent nozzles from touching the ground during machine body deviation due to the spray bar being long and the spray range being wide； in addition, the rotor provides lift for the wide range spray bar, thereby eliminating a complicated and bulky truss structure when the spray bar is extended.L'invention concerne un pulvérisateur à barre de pulvérisation à large plage de type suspension à rotor et son procédé de commande, le pulvérisateur comprenant un corps de pulvérisateur (1), une paire de tambours polygonaux (2) étant installée sur le corps de pulvérisateur (1), et une barre de pulvérisation à large plage à rotor (3) étant disposée sur les tambours polygonaux (2) et étant située des deux côtés du corps de pulvérisateur (1) après le déploiement ； la barre de pulvérisation à large plage à rotor (3) compren
