Abstract: 【Objective】 To investigate the effects of biochar on the biomass, chlorophyll fluorescence parameters and ion distribution of FIG plants under simulated salt stress with 0.6% (102 mmol/L) NaCl solution. 【Method】 The biomass, chlorophyll fluorescence parameters, element and ion contents of 2-year old figs Brunswick and Violette Solise were measured under 0.6% (102 mmol/L) NaCl stress at two biochar levels (non-biochar as control and 50 g/kg biochar soil). 【Result】 The dry weight of leaf, petiole, fine root and thick root of Brunswick and Violette Solise treated by biochar increased significantly compared with the control.The maximum chlorophyll fluorescence parameters of the third true leaf of Brunswick and Violette Soliseon on the 6th day decreased by 34.0%, 14.5% and 52.7%, 43.8%, respectively, and the maximum chlorophyll fluorescence parameters of Brunswick and Violette Solis were higher than those of Violette Solise.The maximum photochemical efficiency (Fv/Fm) of PS Ⅱ decreased by 30.3%, 21.9% and 31.6%, 28.0%, respectively.In terms of ion distribution, the content of toxic ions Na⁺ and Cl^- in leaves and roots of plants treated by biochar significantly decreased compared with the control, while K⁺ and Ca²⁺ showed a significant increase trend. 【Conclusion】 Applying biological carbon reduces the absorption of toxic ions and the decline of chlorophyll fluorescence parameters in FIG plants under salt stress and a higher value and the balance of ion distribution maintain, the biomass of roots and leaves significantly increases, and their absorption of nutrients and minerals is significantly increased.