The fitting technique with three Gaussian functions is introduced, The remote wing of Hα line shape is fitted with single Gaussian function at first, the ion temperature of plasma is derived from the Doppler broadening, then the residuals of Hα line shape is fitted with double Gaussian functions. The incident velocity of reflected particles and desorbed particles are 3.0×104 m/s and 1×104 m/s respectively, which are derived from the Doppler shift of Hα line shape, the recycling particles consist of 60% reflected particle and 40% desorbed particles, which are derived from the intensity of Hα line. The profile of hydrogen atom density, the coefficient of emission and particle confinement time are also obtained from the simplified model of particles transport, agreeing with experimental results. The influence of incident velocity on particle confinement time is analyzed. The result shows that particle confinement time is 4～8 ms with normal discharge in HT-6M Tokamak, the velocity of reflected particles directly dominate the magnitude and the radial profile of particle confinement.