The year of 2016 is known as the first year of network video broadcast in China.In the modern society，network video news broadcast dominated by smart phones is more and more popular.The interactive process in live broadcast also includes many aspects，such as diversity of forms，subjects and relations.With the iteration of Internet technology，not only is the development mode of webcast quite different from each other，but also the pace of media updating is accelerating.At the same time，the interaction process in communication will also become diverse.This article will research the development of the network video news broadcast，and analyze its four modes both at home and abroad.