The quality of selective laser melting forming is mainly determined by the combination of process parameters and scanning strategy. In this experiment, the layer partition scanning strategy is obtained through the combination of different layering methods, stacking methods, and scanning methods. The TC4 samples were formed by combining appropriate process parameters with different layer partition scanning strategies. The quality of TC4 samples was studied. The results show that the samples formed by layer partition scanning strategy have higher density and finer distribution of acicular martensite in the microstructure under electron microscope. When the samples with 100 μm layer thickness were formed by layer partition scanning strategy, the side length size error rate and surface roughness become smaller. The samples formed by layer partition scanning strategy have stronger ability to adjust the forming environment and better forming quality than the samples not formed by layer partition scanning strategy.