Abstract: Ozone (O₃) is the main air pollutant in Shandong Province in summer. As an important precursor of O₃ formation, the accurate calculation of Biogenic volatile organic compounds (BVOCs) emissions will play an important role in the prevention and control of air pollution. In this study, the BVOCs emission rate and related meteorological factors of 9 dominant trees in Shandong Province before and after precipitation were monitored. Using G95 light-temperature model-remote sensing leaf biomass correction method, combined with trees stock information. Calculated the total amount of BVOCs emission in Shandong Province. Results shows: ①The total emission of BVOCs in Shandong Province in 2021 was 256.84×10³ t, the main emissions were isoprene (25.74%) and oxygen-containing VOCs (36.61%). Monoterpene (18.20%), sesquiterpene (5.83%) and other VOCs (13.61%) are relatively few. ②Forests and farmland are the main sources of BVOCs emissions, accounting for 58.81% and 32.07%, respectively. ③The four cities with the largest BVOCs emissions are Linyi(11.92%), Weifang (9.81%), Jinan(9.53%) and Yantai(9.09%). ④The BVOCs emission rates of coniferous species Platycladus orientalis (Platycladus orientalis), Pinus koraiensis (Pinus densiflora), broad-leaved species Fraxinuschinensis, Robinia pseudoacacia (Robinia pseudoacacia), Poplar (Populus tomentosa), oak (Quercus Linn) and willow (Salix babylonica) decreased significantly after precipitation(20.71% to 93.94%). The study shows that the BVOCs emission in summer in Shandong Province is high, which has obvious seasonal characteristics; rainfall can reduce the vegetation BVOCs emission in varying degrees, and the concentration of O₃ precursors can be reduced by artificial rainfall or watering during the high incidence period of O₃ pollution in summer.