A flight test has been performed on turbofan engine to get the splitter’s static pressure and distortion with lip width of 1.0mm and 1.5mm from different flight altitudes and velocities.The data show that during the process from maximum rating to minimum augmentation rating

the static pressure difference between the splitter’s inner and outer face will become larger

the quicker of the velocity and the thinner of the splitter

the increase of the pressure difference become faster;the data still show that the pressure difference plays an most important role in the splitter’s distortion

the relationship curve between distortion and the pressure difference has been given in this paper.