计算机网络辅助下的外语教学已经取得了非常显著的成效,多媒体环境下的大学英语教学模式已经建成。目前,商务英语还需一定时间才能实现长足发展,商务英语与计算机网络的整合在现阶段尚不成熟。如何在计算机网络环境下有效地进行商务英语写作教学,又是难中之难。本文分析计算机辅助外语教学中的小组协作学习模式和网络探究教学模式,探讨在商务英语写作教学中如何有效使用计算机网络,提高学生的商务英语写作能力。 Foreign language teaching assisted by computer network has achieved remarkable results. College English teaching mode in multimedia environment has been completed. At present, business English takes some time to achieve rapid development. The integration of Business English with computer networks is not yet mature at this stage. How to carry on the business English writing teaching effectively in the computer network environment again, is the difficult difficulty. This article analyzes the group collaborative learning mode and network inquiry teaching mode in CAI and explores how to effectively use computer network in business English writing teaching to improve students’ business English writing ability.