Inconel 713LC is a Ni-based superalloy, which is known as a non-weldable alloy, subjected to severe solidification cracking during the LPBF process. In this study, a systematic optimization method was constructed to find the optimal parameter region of IN713LC in LPBF additive manufacturing. The optimization method combines the perspectives of reducing the micro-cracks and the pores in melt-pool; therefore, the optimal region of the processing map can provide workpieces with less crack and high density. The specimens were fabricated with various fabrication parameters, leading to different melt-pool sizes, shapes, and different crack density. The corresponding results shows a trend that larger the mushy zone would result in the higher susceptibility of micro-cracking. As a result, the crack density of the specimens in the optimal parameter region has the lowest crack and the high relative densiy. It is found that in the result of the tensile test, LPBF processed IN713LC specimen shows excellent mechanical properties than that in casting.