The utility model relates to an auxiliary stand is measured to ground -object spectrum, its structure has connect the pole setting on the mounting bracket in the fastening, and the competent appearance of last termination in the pole setting has connect the horizontal pole on the body of rod of pole setting, connect first protractor on the horizontal pole, hangs in the centre of a circle of first protractor department and is connected with the optic fibre fixed ruler, is equipped with the fixed knot of optic fibre that fixed optical fiber sensor used on the optic fibre fixed ruler, still connect the second protractor and stop at will on the body of rod of pole setting and supported, be connected with the angulation chi in the centre of a circle of second protractor department, the front end of angulation chi is connected on stopping the cantilever that supports at will, opens the first angle reading hole that has the scale mark that is used for observing on the second protractor on the angulation chi. The utility model discloses observation angle and environment background information have been taken all factors into consideration to different incident lights and the influence of reflected energy survey angle change to surface feature spectrum information simultaneously, are convenient for develop by the better spectral characteristic of simulation surface feature under natural state.