The invention relates to a blade grid wind tunnel revolving window supporting mechanism based on a connecting rod structure. The blade grid wind tunnel revolving window supporting mechanism comprisesrevolving windows, a pedestal, supporting beams, a shaft and gaskets. One shaft penetrates through the centers of circles of the left and right revolving windows for facilitating connection of the supporting beams and the revolving windows. Meanwhile, two pairs of supporting beams are arranged on the left and right sides of the revolving windows, wherein one pair of the supporting beams are horizontal, one end of the supporting beams is fixed on the pedestal by three bolts and the other end is a circular ring; and the other pair of supporting beams are vertical and have the same structure withthat of the horizontal beams. One bearing is respectively arranged between the circular rings of two pairs of supporting beams and the shaft, and the supporting beams are connected with the shaft through the bearings. One end, which is connected with the shaft, of two supporting beams of the same side does not have an axial plane on the same axial position so that four screw holes are arranged for guaranteeing axial fixation of the horizontal and vertical directions. The other end of the supporting beams is not axially on the same plane with the pedestal so that the end of each supporting beam is provided with one gasket for fixation.