The invention provides an aero-engine salt mist sensitivity test device. The test device comprises an air supply unit, a temperature regulation unit, a humidity regulation unit, a salt mist mixed regulation unit, a dynamic salt mist sampling unit, a salt mist protective cabin unit and an exhaust unit, wherein all the units are sequentially connected and are connected to a measurement and control unit respectively. The test device simulates typical marine environmental climates, such as temperature, humidity and salt mist, which a whole aero-engine undergoes during operation in a marine environment, and therefore performance testing and assessment of the aero-engine under the influence of the integrated environment are realized. Besides, the test device also can perform precise control andfree combination on the temperature, humidity and salt content of the simulated environment, and therefore testing on multiple environmental profiles of the aero-engine is realized.