A study was conducted to investigate the effects of dietary calcium (Ca) and phosphorus (P) on juvenile jade perch, Scortum bacoo, and to characterize P deficiency signs. Six isoenergetic and isonitrogenous purified diets （D₁: 0.0% Ca, 0.0% P; D₂: 0.5% Ca, 0.0% P; D₃: 0.0% Ca, 0.6% P; D₄: 0.5% Ca, 0.6% P; D₅: 1.0% Ca, 0.61% P; D₆: 1.5% Ca, 0.6% P） were prepared using casein and gelatin as the main protein sources, Calactate and NaH₂PO₄·2H₂O as the Ca, P source , respectively. A design of six treatments with three replicates per treatment was used. Each group contained 20 juveniles placed randomly in net cages. Jade perch with an initial weight of 13.42±0.68 g were fed to satiation with one of the six diets for 60 days. At the end of the experiment, growth permance, whole body and muscle composition, and mineral (Ca, and P) deposition in vertebrae were measured. Fish fed diets without P supplement（D₁ and D₂） showed reduced final weight, special growth rate and mineral (Ca and P) deposition in vertebrae, and an increase in feed conversion rate , whole body and muscle lipid content than fish fed diets with P supplement (P<0.05). When P was not supplemented, 0.5% Ca supplement had no significant effect on final weight, special growth rate , feed conversion rate , whole body and muscle composition, ash content and mineral (Ca, and P) deposition in vertebrae (P>0.05). When diets were supplemented with 0.6% P, Ca supplement from 0.0% to 1.5%had no significant effect on final weight, special growth rate , whole body composition, muscle composition (moisture, crude protein and ash), vertebrae composition (ash, P and CaP ratio ) (P>0.05) . Excess Ca supplement (1.5%) had a negative effect on vertebrae Ca deposition (P<0.05). Fish fed diets with P supplement（D₃-D₆） showed an decrease in whole body and muscle lipid content, an increase in ash content and mineral (Ca, and P) deposition in vertebrae (P<0.05) . Ca and P supplement had no significant effect on Ca-P ratio ranged from1.78 to 1.82 in vertebrae (P>0.05). If growth performance and vertebrae mineralization are taken into account, 0.5% Ca supplement might be optimum when diet was supplemented with 0.6% P.