By means of the statistical averaging method, the hourly observations of wind profile in winter and summer of 1988 obtained from a meteorological tower in Tianjin are analysed.It is found that significant contrast of statistical characteristics for the mean wind profiles in the surface layer exist between them in winter. This contrast may show the feature of the effect of the urban buildings on the wind profiles in lower atmospheric layer on the part of local climate. However, the statistical rulein summer is differed from that in winter.