With the rapid development of economy in China, the problems such as lacking energy, climate warming are increasingly prominent. The construction industry is a pillar industry of our national economy. However, it was faced with many problems, like huge carbon emissions and high energy consumption. Besides, it is one of the key fields of energy saving and emission reduction in our country. Therefore, reducing the construction industry's carbon emissions is of great significance to achieve the target of energy conservation and emission reduction in China. According to the IPCC carbon accounting methods, this paper constructs a regional construction carbon calculation model of China, based on which we calculate the carbon emissions of each province in construction industry with the panel data of 30 provinces between 2004-2011. On the basis, the decoupling states of carbon emissions in province are analyzed with the Tapio decoupling model, then the influence factors of carbon emissions are discussed by using LMDI method. Results show that the carbon emissions of each province in the construction industry raise year by year, but there are big differences between the provinces. Indirect emissions account for about 90% of the total emissions, which is the main source of carbon emissions of each province in construction industry. Most provinces are in weak decoupling states, the rest of the provinces are in expansion negative decoupling state and connection state, while none of them in strong decoupling state. Energy carbon emission intensity effect, energy structure effect and energy intensity effect have a negative impact, while minor, on carbon emissions in the sample period. While indirect carbon intensity effect and industry scale effect have a positive impact on carbon emissions, and they are the main influence factors. The governments should take some effective measures to reduce the carbon emissions in construction industry effectively, such as using more green building materials, recycling the waste materials, reducing the building materials consumption per unit area, developing and utilizing of clean energy and optimizing the energy structure. Related departments could set proper emissions reduction objectives and promulgate different construction industry development policies according to the differences of the construction industry carbon emissions of each province in China.