According bad forwarding efficiency of security gateway, this paper put forward a new kind of design of data forwarding platform using in security gateway, based on detailed analysis of Linux kernel that is a free software. The guide line of this platform followed. 本文针对安全网络转发效率低下这一问题,在详细分析自由软件Linux内核的基础上,提出了一种新的在安全网关中用到的数据转发平台方案。