Based on the theoretical framework of trade facilitation affecting the value-added trade of Chinese enterprises this paper uses the micro data of Chinese manufacturing enterprises to empirically test the impact and its transmission mechanism of trade facilitation on domestic value-added ratio (DVAR). The results show that with both the trade facilitation comprehensive index and trade facilitation subfield indicators, the promotion of trade facilitation significantly promote firms’ export DVAR. Meanwhile, trade facilitation has a greater role in promoting the export of DVAR in Eastern enterprises, high-tech enterprises and foreign-funded companies than in Midwestern, lower middle technology and native companies. Further tests on mechanisms show that, trade facilitation reduces firms’ export DVAR through relative price effect, but it significantly improves firms’ export DVAR through markup effect, and on the whole, the net effect of trade facilitation on firms’ export DVAR is positive. The above conclusions mean that promoting trade facilitation reform has important practical significance for improving enterprises’ DVAR and export competitiveness.