The principle of the experiment"Exploring the influence of environmental factors on the intensity of photosynthesis" was discussed and analyzed; Illuminance meter were used to test the light intensity of LED lamps with different power and different distances.Experiments were carried out on several sun plants and shade plants to illustrate the difference of light compensation points. The research results showed that increasing the power of light lamps or switching to shade plants could achieve better results, which provides reference for experimental teaching.