The laser in the band of 355 nm and 266 nm can be produced by 1 064 nm YAG laser through nonlinear optical frequency conversion mode. High reflection from double bands must be met by the mirror operating in the system. According to film design theory, the appropriate coating material is chosen. Based on electron beam ion assisted deposition (IAD) technology, through optimizing parameters and repeating tests, the double band mirror is manufactured on quartz substrate, the reflectivity is 97.9% at 355 nm and 96.8% at 266 nm, the laser induce damage threshold (LIDT) is 1.76 J/cm2 at 355 nm and 1.12 J/cm2 at 266 nm ultraviolet band. Test results show that all the characteristics of the mirror accord with operation requirements.