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Based on the data of the PBL observation system at Dali from March to December 2007, the characteristics of turbulent intensity, turbulent variances and turbulent flux are analyzed by using the eddy correlation method. The results show that the turbulent intensity in the dry period is much higher than that in the wet period. The relation between the normalized variance of 3D winds and 〖WTBX〗z/L〖WTBZ〗 satisfies the law of 1/3 fractional power. In the case of stable stratification, the relation of the variance to z/L is dispersed in the horizontal direction. Turbulent flux shows obvious diurnal variation. The values of sensible heat flux and momentum flux are larger in the dry period, but the latent heat flux is lager in the wet period. The latent heat flux is greater in both dry and wet periods.