Future rural distribution network containing large numbers of Distributed Resources (DR) will change the unidirectional power flow characteristics of traditional power grid, and its control strategy should be changed from 'grid-load' control to 'source-grid-load' coordinated control with the integration of DR and multiple loads taken into consideration. In this paper, the impact of multi-source integration on rural distribution network including system reliability relay protection, swithgear, network harmonic, voltage profile, three-phase unbalance, power flow distribution, grid loss, system operation, personal and measurement security is analyzed. The interaction between DR and distribution network is mainly reflected in the following two aspects, one is how DR could access to distribution networks through power electronic devices safely and flexibly, and the other is how distributon networks deal with the access of DR with high capacity penetration effectively. For these issues, this paper conducts research and analysis focusing on DR plug and play safety integration technology, distribution networks protection and control technology, and DR optimal site-selection and fixed-capacity safety planning technology. This work is supported by Science and Technology Project of State Grid Corporation of China “Key Techniques Research and Application of Distributed Substation based on Big Data and Cloud Architecture” (No. SGTYHT/16-JS-198).