The effect of varying $Ca(NO_3)_2$ supply (0, 6, 12, and 18 mM) on growth, ion uptake, leaf chlorophyll concentration and photosynthesis of NaCl-stressed (85 mM NaCl) Cyclocarya paliurus seedlings was investigated. Addition of $Ca(NO_3)_2$ stimulated the shoot growth more than root growth. $Ca(NO_3)_2$ supply increased $K^+$ and $Ca^{2+}$ concentration, whereas the $Na^+$ transport to the leaves was inhibited. There was a strong increase in the $K^+/Na^+$ ratio in the leaves of $Ca(NO_3)_2$-treated seedlings. Leaf chlorophyll concentration and photosynthesis rate were low, but both factors were enhanced by 12 mM $Ca(NO_3)_2$ Therefore, moderate $Ca(NO_3)_2$ supply (12 mM) had optimal effects on growth and metabolism of NaCl-stressed C. paliurus seedlings.