Abstract: Through the investigation of 42"Double First-Class"construction of university libraries to carry out teaching support,traditional teaching support services are still the current service focus of university libraries,and innovative teaching support services should be the future service focus of university libraries to help first-class undergraduate education.It is recommended that university libraries make the following changes:establish a teaching support service department；increase the number of teaching support services；train teaching support service personnel；develop embedded teaching services；lead the construction of online learning platforms；transform or build learning and sharing space.University libraries should seize the school's"Double First-Class"construction opportunities,broaden the wag to serve the First-Class undergraduate education service,and become a First-Class university library.

Key words: "double first-class"construction；university library；teaching support service；first-class undergraduate education