In order to develop a low viscosity fullclosed refrigerator oil that meets the requirements of R600a refrigeration compressors,the qualified composition of L-DRG10 fully enclosed refrigeration base oil was obtained by combining the excellent low temperature performance of naphthenic hydrogenation base oil and the excellent thermal stability and viscoustemperature performance of paraffinbased hydrogenation base oil.Then by adding antioxidant,antifoaming agent,antiwear agent and other functional additives,a L-DRG10 fully enclosed refrigeration oil suitable for R600a refrigeration compressor was developed,which conforms to GB/T 16630-2012.The results showed that some problems of the product existed between refrigerator oil and refrigerant R600a were solved,such as the compatibility,thermalchemical stability,antiwear property,at the same time achieved the industrialized production and market application.The evaluation results show that the L-DRG10 fully enclosed refrigerator oil has good low temperature and lubricity,good compatibility and thermalchemical stability when it coexists with refrigerants