【Objective】The present paper aims to discuss relationships between fruit coloring,anthocyanin biosynthesis and related factors in three red pear varieties.【Method】The saccharic acid content,anthocyanin accumulation and activity of PAL,CHI,CAT,POD and SOD in fruits of three red pear varieties(Zaobaimi,Zhongshu 32 and Yunhonghli 1)introduced from Yunnan were analyzed by the anthranone colorimetry and NaO H neutralization titration method.【Result】The soluble sugar accumulation of three varieties reaches the ma...