本文报道了微波等离子体下（２．４５ＧＨｚ）一氧化碳和甲烷直接转化成低碳烃的一种新方法。研究了影响产物分布的几个因素：微波输入功率、反应物比例及体系压力。乙炔和乙烷是主要有机产物。随着微波输入功率的增加和体系压力或ＣＨ４／ＣＯ比例的降低，乙炔含量增加，乙烷含量减少。反应中有少量乙烯和Ｃ３烃生成。没有检测到Ｃ４及含氧有机化合物。 This paper reports a new method for the direct conversion of carbon monoxide and methane into low-carbon hydrocarbons under microwave plasma (2.45GHz). Several factors influencing product distribution were studied: microwave input power, reactant ratio and system pressure. Acetylene and ethane are the main organic products. With the increase of microwave input power and the decrease of system pressure or CH4 / CO ratio, acetylene content increased and ethane content decreased. A small amount of ethylene and C3 hydrocarbons were formed during the reaction. C4 and oxygen-containing organic compounds were not detected.