The invention discloses a C-modified Li-Nb-RE high-strength heat-resisting aluminum alloy material, which comprises the following components in percentage by weight: 1.0 to 10.0 percent of Cu, 0.05 to 1.5 percent of Mn, 0.01 to 0.5 percent of Cd, 0.01 to 0.5 percent of Ti, 0.0001 to 0.15 percent of C, 0.01 to 1.0 percent of Zr, 0.1 to 3.0 percent of Li, 0.01 to 1.0 percent of Nb, 0.05 to 5 percent of RE (rare earth element), and the balance of Al. A high-quality melt, solid solution and a phase diagraph theory are taken as guidance, a C element serves as a high-efficiency modifier and a preferable formula of principal alloy elements, namely Cu, Mn and RE is adopted, so that the quasi solid-phase temperature range of the alloy is narrowed and problems such as high heat cracking tendency during casting, low strength of a product at high temperature and the like are solved; and a preferable formula of low-cost multiple microalloying elements is adopted, so the high-strength high-resisting aluminum alloy material is developed finally.