Abstract: During the fruits development of a new cultivar Taiwan Lemon shaddock（Citrus limonum Grandis Osbeck），relationship between contents，distribution，absorption regularity of seven metal elements and metabolism of active oxygen were investigated. The results were as follows.（1）The main peel growth period，flesh growth period and flesh colour-changed period were from April to May，June to September and October to November respectively.（2）The contents of K，Ca，Mg，Zn，Mn and Fe in peel and flesh decreased with the fruit growth，but the total adsorption quality was opposite. K content was highest of seven. K，Zn and Fe primary in flesh，while Ca，Mg and Mn were dominant in peel. The highest contentration of Cu was observed in young fruits and the contents of Cu in peel and flesh were almost the same.（3）Absorption centralization of K，Ca，Mg，Zn and Mn were from July to September，however，

Key words: lemon shaddock, fruit development, metal element, adsorption regularity, metabolism of active oxygen