The utility model discloses a field portable vegetation canopy spectral observation support, including the base, be equipped with the pillar on the base, the pillar is from last to being equipped with sighting tube, first pulley, slide rail, second pulley and control pulley down in proper order, the sighting tube sets up perpendicularly in the pillar top, is equipped with optic fibre support and fiber optic probe on the sighting tube, the slide rail sets up perpendicularly on the pillar, and slidable is equipped with and refers to the blank support on the slide rail, refers to blank support right -hand member and is equipped with the reference blank, the control pulley includes and first control pulley and second control pulley all is equipped with the crank on first control pulley and the second control pulley, is equipped with first steel wire on the first control pulley, and first steel wire is walked around behind the first pulley and is referred to blank support left end and be connected, and the second is equipped with the second steel wire on controlling the pulley, and the second steel wire is connected with reference blank support right -hand member after walking around the second pulley. The utility model discloses simple structure, convenient to use, the field of being convenient for is carried and is used.