The liquid liquid equilibrium (LLE) data for the ternary system dichloromethane +water + N,N-dimethylacetamide were determined at (298.15 and 308.15) K and atmospheric pressure. The solubility data were obtained by using the cloud point titration method. The ternary phase diagrams could be drawn from the data of the tie-lines. The experimental data were correlated by using the nonrandom two-liquid (NRTL) model. The binary interaction parameters of the ternary system were regressed by nonlinear least-squares method, then the LLE data of the ternary system were calculated. The results indicated that the calculated LLE data by using NRTL model agreed well with the experimental data. The relative mean deviation and the average mean deviation were no more than 1.484 % and 0.513 %, respectively.