A method for forming a porous coating layer on a surface of an implant for inserting a living body according to a first embodiment of the present invention includes: a first step of providing an implant matrix made of a material containing a metal component； And a second step of sintering a metal powder on the surface of the implant mother body using rapid prototyping； and the second step includes a preset movement of a laser beam irradiation tool required for the rapid prototyping technology. While repeatedly moving along a path, the metal powder sprayed along the preset movement path on the surface is sintered to form a porous coating layer on the surface of the implant parent body, and the preset movement path is 1 straight section path, the first curved section path, the second straight section path, the second curved section path, the third straight section path, the third winding section path, the fourth straight section path, and the fourth winding section path, , The first curved section path changes the second straight section path to a predetermined first angle with respect to the first straight section path, and the second curved section path comprises the third straight section path. The second straight section path is changed to a predetermined second angle, and the third curved section path changes the fourth straight section path to a predetermined third angle based on the third straight section path. In the fourth curved section path, the first straight section path is changed to a predetermined fourth angle with respect to the fourth straight section path, and the first curved section path and the second curved section path , In the process of changing the movement path of the laser beam irradiation tool to the first angle, the second angle, the third angle, and the fourth angle, respectively, the third bend section path and the fourth bend section path By reducing the decrease in the moving speed of the laser beam irradiation tool, the difference i
