The effects of shading on the chlorophyll content, dry weight, dry weight ratio anthocyanin content, soluble sugar content and CmUFGT expression level in flowers were studied with Chrysanthemum cultivars ‘Zichonglou’ at different flower developmental stages. The results showed that: (1) shading at visible flower bud stage and visible flower color stage, Chl a and Chl b contents increased gradually with the decrease of light intensity; Chl a and Chl b contents of L3 treatment were significantly higher than that of other treatments. While Chl a and Chl b contents were first rose and then dropped with the decrease of light intensity under shading at fullbloom stage; Chl a and Chl b contents of L1 treatment were significantly higher than that of other treatments. (2) With the decrease of light intensity, the dry weight of inflorescence decreased, and the dry weight ratio increased firstly and then decreased; The dry weight ratio of L1 treatment increased. (3) Shading at visible flower bud stage and visible flower color stage, the anthocyanin content was increased firstly and then decreased following flower inflorescence development, while the anthocyanin content was decreased under shading at fullbloom stage; In the third and fourth stages of inflorescence development, anthocyanin content increased when the light increased; In the seventh and eighth stages, anthocyanin content was increased when the light decreased. (4) Following flower inflorescence development, the content of soluble sugar under shading increased initially and then decreased; The content of soluble sugar increased in L1 treatment. (5) Shading significantly inhibited the expression of CmUFGT at the fifth stage of inflorescence development, and its expression decreased gradually with the decrease of light intensity; The expression of CmUFGT reduced in the third and fourth stages in L1 treatment at visible flower bud stage and visible flower color stage. It has been concluded that following the flower inflorescence development under the mild shading (L1) inhibits the expression of CmUFGT, promotes the increase of soluble sugar content and the synthesis of anthocyanin at middle stages (the third, fourth stage); the severe shading (L3) alleviates the degradation of anthocyanin at the late stages (the seventh, eighth stage).