Abstract: Evaluation of the service function of artificial forest ecosystems is important in applied ecology, it is also in demand for high-quality development of digital ecology and forestry． Badaling forest plantation ecosystem (mixed forest, coniferous forest and broad-leaved forest) and natural shrub forest in Beijing were studied． The forest resources inventory data of Beijing (in 2004, 2009, 2014) and Badaling forestry carbon flux with real-time monitoring were used as data sources. Field investigation and observation of typical samples and sample analysis were applied to evaluate the ecosystem service function． The aim of the study was to optimize the structure of the forest management system and to improve the function of forest ecosystem． It was found that from 2004 to 2014, the area growth rate of coniferous forest and shrub forest was 40.48% and 3.32%, respectively, but that of broadleaved forest and mixed forest decreased to 46.33% and 3.57%, respectively． The forest farm was still dominated by mixed forest and shrub forest, at 703 hm² and 1182 hm², respectively in 2014． Linden trees in broadleaf forests gradually became the main tree species, water conservation in 2014 increased by 1.55 times compared with 2009． As the dominant tree species in mixed forests, the physical amount of water conservation in Pinus tabulara increased by 67% in 2014 compared with 2004． In 2014, the shrub forest showed a large increase, water conservation doubled that in 2004． The functions and values of regulating services of carbon sequestration, oxygen release, negative oxygen ion supply, dust retention and pollutant absorption were: mixed forest > coniferous forest > broad-leaved forest (P > 0.05)． The soil fixation and fertilizer conservation functions of shrub forest was better than the other three (mixed forest, coniferous forest, broad-leaved forest, shrub forest)． The nutrient accumulation and biodiversity conservation of mixed forest and coniferous forest were better than broad-leaved forest． The contributions of soil conservation (92.91%), biodiversity conservation (4.33%) and water conservation (2.33%) to ecosystem services were greater than carbon sequestration and oxygen release (0.37%), forest protection (0.04%) and air purification (0.02%)． The contribution of mixed forest and coniferous forest to plantation ecosystem services was greater than that of broad-leaved forest and shrub forest． Thus, stand types and forest area are the main determinants of ecosystem service function of plantation ecosystem． The management of plantation should be guided by soil and water conservation function, on the condition of ensuring biodiversity． Attention should be paid to the function of carbon sequestration． Existing stand should be attributed to mixed forest and shrub forest, to construct an ideal plantation ecosystem with different age and multi-layer, and gradually improve the ecosystem service functions．