Improving agricultural labor productivity is crucial to the accelerating the construction of an agricultural power. Based on the analysis of the reasons for the low agricultural labor productivity in Beijing， this paper points out that universal agricultural policies are not suitable for the development of urban modern agriculture in the surrounding areas of large cities represented by mega cities such as Beijing， and innovative support policies for urban modern agriculture are becoming increasingly urgent. Accordingly， it is proposed that We should dialectically view the problem of low agricultural labor productivity in mega cities such as Beijing and implement targeted and precise policies， so as to classify and precisely implement policies. We should strengthen policy guidance and financial support， and guide agricultural development of mega cities such as Beijing to focus more on urban modern agriculture， and improve the level of high-quality agriculture， short-chain agriculture， technology-based agriculture， and integrated development in rural industries. Meanwhile， we should adhere to pilot projects， innovative policies， and support of mega cities such as Beijing in creating an urban modern agricultural pioneer city.