Abstract: In order to improve comprehensive management level of agricultural mechanization in Beijing City, achieve scientific monitoring and evaluation of agricultural machinery operation quality, and support scientific distribution of subsidies for protective tillage operations, the Beijing agricultural machinery big data platform has been developed．This platform included five modules: agricultural mechanization comprehensive exhibition, cooperative management, agricultural machinery management, precision operation management, and subsidy operation supervision．From 2020 to 2022, 749 sets of monitoring terminals for conservation tillage operations were installed．Centering on three operation links of deep loosening, straw returning to field and less and no-tillage seeding, this platform collected equipment and operation information from 101 cooperatives and 29 agricultural machinery households, with a total operating area of 83000 hectares and a total of 25685 operating plots．Monitoring area accounted for 71.51% of total planned area reported by each district, supporting distribution of agricultural machinery operation subsidies of 6042.31 million yuan in 9 agricultural districts in Beijing City．