The Las Angeles Smog Incident happened in 1943, and until 1970s the city was called the“smog city”. It was analyzed that smog in Los Angeles came from ozone in summer and from PM2.5 in winter. The paper discusses the effects and measures Los Angeles has taken to handle the air pollution, such as, air pollution control legislation, adopting emissions license system, fostering advanced technologies, and setting up the interagency administration. The clean air was achieved by these measures:the unhealthy air days in California was reduced by 74 percent in 2012 compared to 2000. The paper also gives some suggestions for Chinese current haze control as follows:emphasizing the forecast and analysis on air pollution, introducing the market mechanism, establishing interregional air pollution control administration, and enhancing sino-US cooperation in environment protection.%1943年美国发生了著名的“洛杉矶雾霾”事件，直到20世纪70年代，该市区还被称为“美国烟雾城”。洛杉矶雾霾夏天主要起因于臭氧，冬天主要是源于细微颗粒物等。洛杉矶在治理雾霾方面的主要做法包括立法、排污许可证制度、推广先进环保技术、建立排污交易机制和成立跨部门专门机构等，其治理工作取得了明显成效：2012年，加州达到“不健康空气”水平的日子比2000年减少了约74%。我国治理雾霾，应更加重视空气污染的长期性预测分析，引入市场机制，成立跨地区的空气污染治理机构，同时，加强中美间环保科技的国际合作。
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