The invention relates to a method for frozen-storing and fresh-keeping cedrela sinensis at a low temperature and a method for flexibly packing the cedrela sinensis. The method for frozen-storing and fresh-keeping the cedrela sinensis at the low temperature comprises the steps of the clearing up, cleaning, blanching, hardening, quick freezing, packing and frozen-storage of raw materials; and the method for flexibly packing the thecedrela sinensis comprises the steps of pretreatment, cutting up, mixing, packing and sterilizing. Through comprehensive research on the physiological and breath change and sensitivity to temperature of the cedrela sinensis in a fresh-keeping process and a color change mechanism and the like of the cedrela sinensis in machining, key industrial generic technology, such as secure color protection, color preservation and the like, at the low temperature in the machining is researched and developed and the problem of bottleneck in the fresh-keeping machining of the cedrela sinensis is solved. In the method, sesame lignan and tea polyphenol with inoxidizability and a bacteriostatic action are reasonably added into ingredients in the process so as to achieve relatively better effect on the color preservation and quality preservation of the cedrela sinensis; and after being packed and sealed, the cedrela sinensis is sterilized twice (at two different temperatures and for two different sterilization time periods) and the flexibly packed cedrela sinensis of the invention is greenish.