Abstract: 【Objective】The effects of different temperatures and humidities on the moisture，color and volatile components of Citrus reticulata ‘Chachi’were explored to provide reference for the scientific storage and comprehensive processing and utilization of C. reticulata ‘Chachi’.【Method】Taking the C. reticulata‘Chachi’in 2022 as the research object，they were treated under the environment of high temperature and high humidity（35 ℃ ，85%）for 5 d，then treated under the environment of low temperature and low humidity（20 ℃，55%）for 5 d，and alternately treated under the two environment for 180 d，with room temperature（25 ℃，65%）as the control group. The water content and water activity were used to analyze the water content change，chromatic value and browning degree were used to analyze the color change，and the volatile components were identified by gas chromatography-mass spectrometry.【Result】Compared with the control group，the water content and water activity of C. reticulata ‘Chachi’were significantly increased（P<0.05，the same below），the total color difference（ΔE^*）of the front side was extremely significantly increased（P<0.01， the same below），and the browning degree during 90-180 d was significantly. A total of 80 volatile components were detected in the control group and the treatment group，including 28 olefins，14 aldehydes，12 esters，14 alcohols，1 alkanes，5 ketones，2 phenols and 4 acids. Olefins and esters were the main volatile compounds in C. reticulata ‘Chachi’， with relative contents of 34.14%-57.18% and 27.43%-46.62% respectively. The relative content of methyl 2-methylamino benzoate was the highest in the two groups of C. reticulata ‘Chachi’，followed by D-limonene. After 180 d of treatment， the relative contents of esters and acids in the treatment group were significantly and extremely significantly higher than those in the control group respectively，the relative contents of aldehydes and phenols were extremely significantly lower than those in the control group，and the relative contents of alcohols were significantly lower than those in the control group. The relative content of methyl 2-methylaminobenzoate in the treatment group（42.31%）was higher than that in the control group（36.49%）. The relative content of D-limonene in the treatment group（16.91%）was lower than that in the control group（18.80%）. Myristic acid and γ-serine were only detected in the control group，and linoleic acid was only detected in the treatment group.【Conclusion】The alternating treatment of high temperature and high humidity-low temperature and low humidity has significant effect on the moisture，color and volatile components of C. reticulata ‘Chachi’. The moisture content，water activity and ΔE^* increase significantly，and the relative contents of main volatile components change significantly. This practice can be promoted and applied in the actual storage of C. reticulata ‘Chachi’.