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Using theoretical analysis and numerical simulation for different wind direction and speed conditions, this paper studied the flue gas flow pattern within and outside continuous side opening shaft. It was found that when the building opened in windward side, external wind could produce dynamic pressure difference on the continuous opening ,which made opposite effect with static pressure difference that caused by temperature difference on flue gas flow pattern . There exists the critical wind speed and time that make the flue gas flow pattern changed from previous state to opposite. Negative pressure outside the Leeward openings enhanced stack effect, and favored smoke exhaust under fire conditions. External wind played a close role in the shaft when the openings were in sideward side, and not conducive to effective discharge of smoke. But it has little effect on flue gas movement when the openings in leeward and sideward of the building.