Solid–liquid phase equilibrium data for binary(L-arabinose–water) and(D-xylose–water) systems at temperatures from(269.85–298.05) K and ternary(L-arabinose–D-xylose–water) system at temperatures of 273.85 K,278.85 K and 284.45 K were measured at atmospheric pressure.The ternary phase diagrams of the systems were constructed on the base of the measured solubility.Two pure solid phases were formed at given temperatures,including pure L-arabinose and pure D-xylose,which were con firmed and determined by the method of Schreinemakers’ wet residue.At the same temperature,the crystallization region of L-arabinose was larger than D-xylose’s.The acquired solubility data were then correlated using the NRTL model,Wilson model and Xu model.The calculated solubility with the three models agreed well with the experimental values. Solid-liquid phase equilibrium data for binary (L-arabinose-water) and (D-xylose-water) systems at temperatures from (269.85-298.05) K and ternary (L-arabinose- 273.85 K, 278.85 K and 284.45 K were measured at atmospheric pressure. The ternary phase diagrams of the systems were constructed on the base of the measurement solubility. Two pure solid phases were formed at given temperatures, including pure L-arabinose and pure D- xylose, which were con firmed and determined by the method of Schreinemakers’ wet residue. At the same temperature, the crystallization region of L-arabinose was larger than D-xylose’s.The acquired solubility data were then correlated using the NRTL model, Wilson model and Xu model. The calculation solubility with the three models agreed well with the experimental values.