Light distribution measuring device and method for crop canopy

The invention discloses a light distribution measuring device and a method for crop canopy and relates to the technical field of light distribution measurement. The device comprises a bearing unit, a receiving unit and at least one light sensor, wherein the bearing unit comprises a supporting part and a bearing part which is the same as leaves of a to-be-measured plant in shape; the light sensors are arranged on the bearing part respectively and are connected in series sequentially; and one of the light sensors is connected with the receiving unit. According to the invention, the bearing par of the bearing unit, which is the same as the leaves of the to-be-measured plant in shape, is used for bearing the light sensor, so that the measuring position can be adjusted conveniently, the natural shape of the leaves of the plant is not damaged, and the precision of light distribution measuring is improved.