双十一购物狂欢节，是指每年11月11日的网络促销日，源于淘宝商城（天猫）2009年11月11日举办的网络促销活动，当时参与的商家数量和促销力度有限，但营业额远超预想的效果，于是11月11日成为天猫举办大规模促销活动的固定日期。双十一已成为中国电子商务行业的年度盛事，并且逐渐影响到国际电子商务行业。
Double eleven shopping Carnival refers to the online promotion day on November 11 every year, which originates from the online promotion activities held by Taobao Mall (tmall) on November 11, 2009. At that time, the number of merchants and promotion efforts were limited, but the turnover was far beyond the expected effect, so November 11 became a fixed date for tmall to hold large-scale promotion activities. Double eleven has become the annual event of China's e-commerce industry, and gradually affects the international e-commerce industry.
2014年11月11日，阿里巴巴双十一全天交易额571亿元。2015年11月11日，天猫双十一全天交易额912.17亿元。 2016年11日24时，天猫双十一全天交易额超1207亿 。2017年“双十一”天猫、淘宝总成交额1682亿元。2018年天猫双十一全天交易额2135亿 。
On November 11, 2014, Alibaba's double 11 full day trading volume was RMB 57.1 billion. On November 11, 2015, the trading volume of tmall global 11 was 91.217 billion yuan At 24:00 on November 11, 2016, the trading volume of tmall global 11 all day exceeded 120.7 billion. In 2017, the total turnover of tmall and Taobao in "double 11" was 168.2 billion yuan. In 2018, tmall's all day trading volume was 213.5 billion.