This study investigated the high-temperature oxidation and self-healing behavior of promising environmental barrier coatings (EBCs) material Sc2Si2O7 containing 10 vol% SiC dispersed nanoparticles is reported for oxidation times up to 10 h at temperatures of 1100 and 1300°C. Sc2Si2O7/SiC nanocomposites were prepared by spark-plasma sintering at 1600°C for 20 min. To evaluate the crack-healing rate of Sc2Si2O7/SiC nanocomposites, derived cracks were induced on a polished surface of each specimen by using a Vickers hardness indenter at a load of 2 kgf. Specimens were exposed at 1100°C and 1300°C for 0.5, 2, 5, 10 h in air.  Artificially induced surface cracks did fully crack healing after heat treatment at 1300°C for 5 h in air. The mechanism of self-healing is attributed to the volume expansion resulting from oxidation of SiC to SiO2. It was confirmed that a deeper oxidation zone and higher crack recovery rates were formed at 1300°C than 1100°C with the increase of time.