The utility model provides a system is regulated and control in real time in boundary layer wind tunnel test flow field based on coarse unit of wedge, including can be around the rotatory flat board of center pin, dull and stereotypedly divide into a plurality of layers with the wind -tunnel, wherein, the wedge of the same shape is evenly placed to each layer, and the area of the wedge that from the top down placed respectively and size are by diminishing greatly. The specific implementation thinking does: utilize the baffle to cut apart into a plurality of " local flow fields " with wind -tunnel whole flow field, through the rotation angle who adjusts each layer flat board, the size of dull and stereotyped quantity and each layer terminal wedge of flat board, interval, shape etc. Realize the quantization control to " local flow field ". To " local flow field " when carrying out quantization control: the average wind profile in change mainly used regulation and control boundary layer of dull and stereotyped rotation angle and wedge shape, size makes turbulence intensity reduce along with the increase of height, can improve turbulence intensity along with the too fast shortcoming of high decay simultaneously. Finally, make each " local flow field " intercoordination, obtain the required flow field quality of experiment.