本文就目前网络免费信息资源的现有传播方式与类型，简明介绍通过网络检索免费食品文献的方法及技巧。仅供从事科技方面的用户进行网络免费文献检索时参考。 This article briefly introduces the methods and techniques of searching free food literature through internet on the existing ways and types of free information resources in the network. Only for scientific and technical users in the network for free literature search reference.