Owing to the excellent physical and mechanical properties, Ti1023 alloy has been used widely in large structure parts. Nowadays Ti1023 ingot is produced by vacuum arc remelting（VAR) process, which may cause the β freckles due to this alloys high Fe content. So the β freckles can affect forgings properties. In this work, the shape of molten pool and the element distribution of the Ti1023 ignot at different stage during the VAR process have been simulated by Melt FlowVAR. In order to validate the agreement between the model and experiment results, a fullscale Ti1023 ingot has been prepared. The results show that the shape of molten pool changed from bowl shape in the initial stage to Vshape in the medium stage, and then to deep Vshape in the last stage during the melting process. The final depth of the molten pool is about 028 m, which is in good agreement with the experimental result. In the top and bottom part of the ingot, the simulated results of the distribution of Fe and Al are in good agreement with the measured results. However, there is a big deviation between the measured and modeled results for the distribution of Fe and Al in the middle part of the ingot, which should be attributed to the computing deviation of isometric crystals sedimentation in this model.