Two-dimensional (2D) materials have attracted great research interests due to their unique properties. 2DMoS2, unlike its bulk form which widely used as solid lubricant and catalyst, is of brilliant application prospect innanoelectronics and optoelectrnics. The electronic devices work in kinds of radiation environment. To evaluate theion radiation effects on material properties and stability of device, the swift heavy ion radiation effect on single-layerMoS2 was studied in this work[1??2].