Abstract: In order to study the influence of grid controllation, safety operetion and distribution grid maintenance while the distributed solar generation accessing to the power grid, based on the princeple and framework, and also by field research and theoretical calculation, this paper analyzes the risk of anti-delivery of current and the influence to short-circuit current, relay protection, automation, system stability, and then discusses the usage of some related standards and institutions. Finally, this paper gives some measures to fasten the safety controllation, it proposes to examine the equipment carefully and force the security measures strictly. All the suggestions will promote the safety of operation and maintenance, while the distributed solar generation developing vigorously.