The invention provides a quick-freezing freshness retaining method for
bamboo shoots. The method is characterized by comprising the first step of choosing fresh
bamboo shoots which are full, intact, clean, good in color and luster and free of
corrosion, mould, peculiar smells as well as pests, diseases and mechanical damage influencing eating, and precooling the collected
bamboo shoots in a
refrigeration house for 10-24 hours; the second step of hulling, cleaning and dicing the precooled fresh bamboo shoots; the third step of soaking the bamboo shoots in a compound crispness-keeping agent solution of
antioxidant substances or high polymeric substances for 20-60 minutes; the fourth step of draining off the soaked bamboo shoots and pouring
liquid nitrogen to make the bamboo shoots quickly freeze to the central temperature between minus 10 DEG C and minus 20 DEG C in the environment at the temperature
ranging from minus 40 DEG C to minus 198 DEG C; the fifth step of placing the fresh bamboo roots which are quickly frozen into the
refrigeration house at the temperature
ranging from minus 10 DEG C to minus 25 DEG C for
frozen storage for 12-24 months to obtain quick-frozen bamboo shoots. Compared with the prior art, the method can increase the
glass transition temperature of the bamboo shoots, improve the quality of the quick-frozen bamboo shoots, make energy saved and consumption reduced in the quick-freezing process, lower product cost and increase benefits; besides, by the adoption of the method, the problems that after the bamboo shoots are unfrozen, juice loses, main parts of the bamboo shoots become soft, crispness is lowered, and the quality of the unfrozen bamboo shoots is obviously worse than that of the fresh bamboo shoots can be effectively solved, and the quality of the unfrozen bamboo shoots is approximate to that of the fresh bamboo shoots.