近年来，电子束与等离子体互作用产生高功率宽带微波辐射，由于其具有可调谐等优点而受到国际上的普遍关注。这一互作用过程的辐射机制目前大致分为等离子体辐射和电子束辐射两大类。本文在简介了有关实验情况后，对几种辐射机制，包括逆Ｃｏｍｐｔｏｎ散射、孤立子场中群聚电子的辐射、非线性等离子体电流引起的辐射等作了评述。 In recent years, the interaction of electron beam with plasma to produce high-power broadband microwave radiation has attracted worldwide attention because of its tunable and other advantages. The radiation mechanism of this interaction process is roughly divided into two major categories of plasma radiation and electron beam radiation. In this paper, after briefing on the experimental conditions, several radiation mechanisms, including inverse Compton scattering, cluster electron radiation in isolated subfields, and radiation caused by non-linear plasma currents, are reviewed.