Abstract: Turbulence can be calculated through the fluctuating pressure in the inlet wind tunnel test. The accuracy of the fluctuating pressure measurment depends on the tubing ahead of the fluctuating pressure sensors. In this paper, the effects of tubing on turbulence are researched based on the dissipation model of dynamics and are verified by the inlet wind tunnel tests. The research results show that the tubing ahead of the sensor has a serious effect on the turbulence. The amplitude of the fluctuating pressure increases and the measured turbulence is magnified when the effect of tubing exits. In order to eliminate the error brought by the tubing, the way using tubing to measure fluctuating pressure should be avoided in the inlet wind tunnel test. If the tubing is inextricably used in test and the length of tubing is more than 5 mm, the final fluctuating pressure data should be revised.