Based on WRF3.8.1 and NCEP FNL data (1°×1°), a day-by-day dynamic downscaling simulation of the land boundary layer wind field at 10 m, 70 m, and 100 m in Shandong in 2017 is carried out. According to the daily mean wind speed of 122 weather stations in Shandong during the same period, the simulation results are evaluated. The results show that WRF model can soundly simulate the daily mean wind speed variations in Shandong, while the simulation value is generally larger than the measured value. The accuracy of simulation results of mean wind speed in different regions of Shandong shows obvious differences, and the characteristics of simulation error of each season are slightly different from those of the whole year. The yearly and seasonal mean wind speed and the annual mean wind power density at various heights are larger in the coastal areas of Shandong, the hills to the north of the peninsula, Mount Lao, Wulian Mountain in the central part of Rizhao, the central mountain area of Shandong, and large lakes such as Weishan Lake and Dongping Lake. The annual mean wind speed is relatively small in the low-lying plain areas of the middle and upper reaches of Dawen River, Daqing River, Si River, Yi River and its tributaries, Zi River, and Wei River. The differences of wind energy resources in different regions decrease with the increase in height. The spatial and temporal distribution of annual and seasonal wind power density at different heights can provide reference for the site selection of the decentralized wind farm of low wind speed and the exploitation of wind energy resources in inland regions of Shandong.