The invention discloses a double-fluid flow-jetting device capable of changing the incoming flow state and arranged in a wind tunnel. The device comprises a support body and a flow-jetting structure connected on the support body in a support manner, the support body is provided with an air joint and an airflow channel communicating with the air joint, a main air stabilization chamber communicatingwith the airflow channel is formed in the flow-jetting structure, the rear of the main air stabilization chamber is connected with a flow-jetting contraction portion, a flow-jetting throat portion and a flow-jetting expansion portion in sequence, disturbance chambers mutually isolated from the main air stabilization chamber are also formed in the flow-jetting structure, the disturbance chambers are connected with an air-inlet pipe used for supplying a disturbance air source, one wallboard of each disturbance chamber is provided with a disturbance channel communicating the disturbance chamberand the outside in a penetrating manner, and the disturbance channel is used for mixing main flows sprayed by air in the disturbance chambers and a wind tunnel spraying pipe. According to the device,double-spraying-pipe shearing flow can be realized, the incoming flow state of the wind tunnel spraying pipe can be changed, experimental requirements in various conditions can be met, the investmentis reduced, and the replacement of wind tunnel equipment is avoided.