To　improve　the　mechanical　properties　of　Ti6Al4V　alloy　prepared　by　selective　laser　melting　(SLM)　process,　the　precision　forging　was　conducted　at　950　degrees　C　and　different　strains　and　strain　rates.　The　microstructure　evolution　of　as-built　samples　and　forged　samples　in　both　horizontal　and　vertical　sections　was　visualized　and　analyzed　by　optical　microscope　and　X-ray　diffraction.　The　microstructure　was　improved　by　the　precision　forging　and　subsequent　water　quenching.　The　porosity　in　each　section　was　accounted.　It　can　be　seen　that　high　strain　rate　and　large　deformation　result　in　low　porosity,　consequently　contributing　to　a　better　fatigue　performance.　The　micro-hardness　was　lowered　after　precision　forging　and　water　quenching,　while　the　difference　of　microhardness　between　the　horizontal　and　vertical　sections　became　smaller,　which　illustrated　that　this　process　can　improve　the　anisotropy　of　structural　components　fabricated　by　SLM.