Effects of artificial reefs (AR) and their compounds on flow field have been studied through wind tunnel experiments under conditions of 6 m/s, 9 m/s and 12 m/s, on such single AR models with different shapes of cube, pyramid and triangular prism. As conclusions, it was found that the ranges of upwelling and wake increased with the increase of water speed; the distribution and range of upwelling and wake of the hollow models were smaller than the solid models under the same water speed, the reflux velocity of hollow models decreased with the increase of porosity of AR models; the turbulence intensity in z direction was stronger than x direction of all models. For compound cubic models, the speed of the center points increased with the increase of water speed, and the flow field has the biggest change when the distance between 1 to 1.5 times of model size at the same water speed; effects on flow field of the parallel compound models were bigger than the vertical compound models.