Titanium alloy possess outstanding comprehensive properties, and they are important metal structural materials which have been widely used in aerospace industry, chemical industry, marine engineering and other fields. This study adopts laser melting deposition (LMD) technique to prepare TC4 titanium alloy, and mainly focuses on the study of optimal optical powder matching for forming equipment. As a result, a method for optimizing the processing parameters of forming was established, which based on such constraints like macro profile of cladding layer, dilution rate, shape coefficient, etc. Moreover, this study determines the optimum range of overlapping ratio through establishing critical lap rate model of cladding layer and conducting a single factor experiment. The optimal combination of processing parameters was used to form TC4 titanium alloy and its structure and properties were evaluated. The result shows that the low-magnification structure of TC4 titanium alloy as deposited is mainly composed of epitaxially grown coarse β columnar crystals and continuous intergranular α phase. The intragranular structure is mainly acicular martensite α phase, and granular secondary α phase dispersed in the microstructure under SEM. The microhardness and elongation in longitudinal of sediment state are slightly greater than that in transverse, nevertheless, the transverse tensile strength and yield strength are both higher than that in longitudinal state. The transverse tensile fracture is characterized by intergranular fracture and the longitudinal tensile fracture is characterized by plastic fracture. The sediment state of TC4 titanium alloy formed by optimized processing parameters is superior to the mechanical properties stipulated in SAE AMS 4999A standard.