Abstract: This paper reported the results of several kinds of pretreatment on vacuum freezing drying(VFD)of Tanbu’s taro. The microwave treatment of Tanbu’s taro for 3 minutes ranks first with the sensory evaluation the score 86.0.2% Citric acid is the best color fixatives to taro,with△E~*ab values after being vacuum dryed and restored as 1.77 and 3.80 respectively.In the treatment between 25℃or 75℃,the vacuum freeze drying of taro at 50% for 30 minces has all optimum quality.And its reconstitution rate in water is 2.78 times and water-keeping rate 60.85%.

Key words: vacuum freeze drying； Tanbu&rsquo, s taro； flavor； color；