In order to know the campus of Beijing normal university campus early spring flowering plant phenology and species diversity, in March 2021 - April on the campus of early spring flowering plant species investigation and flowering time and temperature observations, and mid to late April to decorate the different samples, compared the different herbal plant community species diversity, The effects of light environment and human disturbance on species diversity were analyzed. The results showed that there were a total of 21 families and 45 species of early flowering herbaceous plants in the campus, and most of them were perennial plants. The main colors of flowers were yellow and purple. The flowering peaks of early spring flowering herbaceous plants were concentrated around Tomb-sweeping Day and the end of April, and the habitat conditions had a certain influence on the flowering period. The first flowering time (lunar calendar) of the same species of plants was the same as in 2016, 8 days earlier than in 1960, and the rising temperature caused the flowering time to be earlier. Light had a great effect on the total coverage of flowering herbs in early spring. Under moderate intensity of human disturbance, the species diversity of early spring flowering plants was the highest. The diversity of the artificial early spring flowering herbaceous community was slightly lower than that of the natural herbaceous community. Species diversity and evenness of early spring flowering herbaceous plants on campus were generally low. This study revealed the factors influencing the phenological rhythm and species diversity of early spring flowering herbaceous plants on campus, and provided a reference for understanding the status quo of campus plants and maintaining campus biodiversity.