Abstract:The effects of different storage conditions on the sugars of chestnut kernel were studied.Fresh chestnut kernels were stored under three different storage conditions:box-type controlled atmosphere（BCA；5% O2，4% CO2，0 ℃），active modified atmosphere packaging（AMAP；17% O2，4% CO2，0 ℃），and passive modified atmosphere packaging （PMAP；polyethylene plastic bags for packaging，0 ℃）.The concentrations of soluble sugar，reducing sugar，and starch，and sugar composition of chestnut kernels were determined.Occurrence of mildew in chestnut kernels under BCA was 63.2% for 30 d.The storage life of chestnut kernels by AMAP and PMAP was approximately 50 d；PMAP was easier to operate.The soluble sugar content increased to 29.44% after AMAP storage for 20 d，then tended to decrease.The soluble sugar in chestnut kernels increased significantly（p＜0.05），while starch and amylose starch decreased significantly （p＜0.05）during storage.The composition of sugars of chestnut kernels determined by ion chromatography included sucrose，stachyose，raffinose，glucose（93.37%，2.43%，2.20%，1.21%，respectively）.The content of sucrose accounted for 96.11%-98.25% after the three storage conditions.Stachyose and raffinose contents after AMAP storage declined the most.The findings indicate that PMAP is most suitable for the preservation of chestnut kernels.