Issues related to the flow field distribution of permeable frame near the river dynamics by using high-precision tank testing,the use of control systems based DCMS inverter technology,carried out through a single empty tetrahedral model test.Test through the air around the tetrahedral arrangement of 972 measuring points,each measuring point using propeller photoelectric velocity measurement.By comparison with frameless flow field,cross-sectional analysis of the flow velocity in the vertical direction and the height direction of the law of change,has been through the air velocity distribution in tetrahedral surrounding concrete and deceleration,growth area,the average deceleration rate,revealed through empty tetrahedral water flow disturbance.