Climate change caused by increasing CO_2 emissions has been a common problem faced by governments, among which, carbon leakage created in international trades cannot be ignored. The phenomenon also exists in domestic regional trades. In this paper we use Multi-Regional Input- Output Analysis (MIOA) to estimate CO_2 emissions of Beijing, both as producer and consumer, and to calculate the embodied CO_2 emissions of each sector. Based on location quotient theory, we construct the embodied CO_2 emissions location quotient and analyze the export embodied CO_2 emissions location quotient. We found that, Beijing's total CO_2 emissions in consumption and production activities are 142.79 Mt and 116.80Mt, respectively. The embodied CO_2 emissions in export and import are 28.15 Mt and 54.15 Mt, respectively. Therefore, Beijing is a net CO_2 emissions importer. The three sectors with the largest embodied CO_2 emissions in import are construction, electric power and heat power production and supply, and petroleum processing, coking and nuclear fuel processing. The three sectors with the largest embodied CO_2 emissions in export are petroleum processing, coking and nuclear fuel processing, metals smelting and pressing, and transport, storage and post. The construction sector's embodied CO_2 emissions in import are mainly from Hebei while the embodied CO_2 emissions in import of electric power and heat power production and supply are mainly from Shanxi and Inner Mongolia. The embodied CO_2 emissions in import of petroleum processing, coking and nuclear fuel processing are mainly from abroad.