In traditional empirical mode decomposition (EMD) algorithm, through calculating the local mean value of the upper and lower envelopes which were fitted with cubic spline interpolation based on the extreme point of the signal, the IMF component is obtained.The mathod has the problem of end point effect,severely affecting the extraction of some characteristic signals.Aiming at such problems, a method to improve EMD process by using Cubic Hermite interpolation was proposed,and the improved EMD was realized through LabVIEW platform. Two superimposed sinusoidal signals with different frequency and amplitude were used for algorithm verification. The results show that by using the improved algorithm, the envelope line overshoot and undershoot phenomenon can be effectively alleviated, and the end point effect of low-frequency signals and the local distortion near the end point can be suppressed.