The sol-ge1 organicmodified silica(SiO2:(CH3)2SiO=1:1)moisture-resistant(MR)and porous silicaantireflective (AIR)coatings were studied and developed for laser phosphate glasses in the national high laser systems.The stability of viscosity of MR coa ting solution an d AR colloidal suspension was researched .The surface reflection of coated phosphate glasses decre~ses 6.5％-7.5％.The laser damage threshold of coatings was 12 J/cm2，1 053 nm/1 ns.The coatings roughness(RMS) was 2.523 nm.