Based on ANSYS software, a numerical simulation of wind flow around the wind turbine tower was carried out on a simplified model to reveal the aerodynamic characteristics of wind turbine tower structure, the distribution characteristics of surface wind pressures, the influences of wind speed, turbulence intensity, and different height ratio on the tower surface pressures were discussed. Results show that, several continuous recirculation zones are formed on leeward along tower height from top to bottom, lead to pressure on the wall of leeward is positive; wind speed only has an obvious effect on leeward surface pressure of the tower, has little effect on the windward, side walls of tower; turbulence intensity has a different degree effect on model surface wind pressures, the absolute value of surface pressures on the side walls (large area),leeward are reduced with the increase of turbulence intensity; the height ratio has a significant influence on wind pressures on the model surface. The conclusions provide references for the designing of the wind turbine tower.