Chang'an Avenue (simplified Chinese: 长安街; traditional Chinese: 長安街; pinyin: Cháng'ān Jiē), literally "Eternal Peace Street", is a major thoroughfare in Beijing, China. It is often referred to as the Shili Changjie (simplified Chinese: 十里长街; traditional Chinese: 十里長街; pinyin: Cháng'ān Jiē), meaning the Long Street of Ten Li. Chang'an is the old name for Xi'an which was the capital of China during the Tang Dynasty and other periods.

Strictly speaking, Chang'an Avenue only encompasses West Chang'an Avenue and East Chang'an Avenue. However, it is also used to refer to the stretch from Fuxingmen on the Western 2nd Ring Road to Jianguomen on the Eastern 2nd Ring Road.

In very broad terms, it refers to the stretch of road (the Extended Chang'an Avenue) as the route from Shijingshan District through to Tongzhou District, including portions of the Jingtong Expressway.