Abstract: The response of turbojet engine to the turbulence-type of dynamic inlet total pressure distortion is discussed in this paper. The turbulence-type of dynamic inlet distortion is generated by a blockage plate with 180° circumferential extent and 50% blockage ratio in the blade-tip or blade-hub region of the inlet section. The dynamic distortion generators with either a tip-plate or a hub-plate can set up a very strong pressure fluctuation region respectively at the tip or the hub of the blade. The measurements show that the Amplitude Probability Density （APD） of fluctuating total pressure approximately follows the Normal Distribution, and thus the dynamic distortion generated by the plate is a turbulence-type.The results from testing also show that: （ 1 ） the turbulence-type of dynamic inlet distortion always cause in the engine a "drift-mode" of surge at 100% engine speed, and at 90% engine speed in the case of a decrease about 12% in the first stage turbine-nozzle area; （ 2 ）the inlet distortion generated by the screen produces a "classical-mode" or "deep-mode" of surge; （ 3 ） the degree of the inlet distortion by the screen can change the mode of surge, for example, either when the inlet flow changes from "clean" to distorted at n = 0.87 or when the degree of distortion D [ = （Ptav. -Ptmin）/Ptav.] varies from 0.132 to 0.173 at n = 0.9, a deep-mode surge may be turned into a classical mode; （ 4 ） a decrease in turbine-nozzle area also can change the mode of surge; （5） the engine speed can affect the unstable behaviour of the compressor. At 71.6% engine speed, the instability of the compressor always appears as an overall rotating stall, and at n@0.87, the engine instability is a surge.