The carbon emission of three industries with 15 main energy from 2000—2009 in Tianjin was calculated based on 2006 IPCC Guidelines for National Greenhouse Gas Inventories, which was decomposed into carbon emission factor, energy structure, energy intensity, economic structure, and economic development with LMDI. It showed that in 2001 —2009, economic development and carbon emission factor promoted carbon emission; energy intensity, energy structure and economic structure inhibited carbon emission increase, ...