Abstract：
The test facility which is used to measure the shading effect of the shading device was set up for the study on the shading effect of three different shading modes.The solar heat gain coefficient（SHGC）of the three shading modes was tested.The comparable time area was got by calculation of the solar incident angle and the vertical solar radiation.The result of the solar heat gain coefficient（SHGC）of the three shading modes in the same angle was got.The solar heat gain coefficient（SHGC）of the outside shading mode was little; The solar heat gain coefficient（SHGC）of the middle shading mode was mean; The solar heat gain coefficient（SHGC）of the inside shading mode was great.The solar heat gain coefficient（SHGC）of the different angle in the same shading mode turned less when the angle turned greater.
