Al-Ti-C-Ce　master　alloy　was　prepared　with　K2TiF6,　graphite　powder,　rare　earth　oxide　Ce2O3　and　commercial　pure　aluminum　as　raw　materials,　and　microstructure　of　the　master　alloy　is　observed　by　OM　(optical　microscope),　XRD　(X-ray　diffraction),　SEM　(scanning　electron　microscope)　and　EDAX.　Meanwhile,　effects　of　self-developed　Al-Ti-C-Ce　master　alloy　and　imported　Al-Ti-C-Ce　master　alloy　on　grain　size　and　mechanical　properties　of　7010　aluminum　alloy　were　analyzed.　The　results　show　that　grain　size　in　7010　aluminum　alloy　is　greatly　refined,　and　tensile　strength　and　elongation　of　the　alloy　are　obviously　improved　with　Al-Ti-C-Ce　master　alloy　refinement.