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When using equipment mounted on a meteorological tower to measure wind speeds, the body of the tower will affect and modify the local flow field, produce turbulence around it and wake behind, leading to the measurement flow distortion relative to the true wind flow.A widely applicable CFD software (Fluent) is used to simulate the flow around the Beijing 325 m lattice type meteorological tower, calculate the upstream and downstream flow distortions at the measurement points of the booms, and get the relationship between the distortions and wind directions and wind speeds.The results show that the errors of wind speeds at measurement points are all less than 5% when the booms located on the windward side.This is consistent with the observation and verifies the reliability of the design of the booms of the 325 m meteorological tower.