The invention relates to a method for folding paperboards for supporting objects and an application method of the method, which comprises the following steps: first, at least one group of indentations are pressed at the middle of one piece of paperboard and an indentation group comprises two indentations; wherein, at least one indentation is fluctuated and bended; the paperboard on the two sides of the indentation group is folded and matched well along the indentation group to form a paperboard belt with cylinder holes. The folded paperboard belt is further folded along the direction of the cylinder holes to form an overlapping shape of multi-cylinder holes. The application method for folding the paperboard with the cylinder holes comprises the processes: the paperboard is folded along the indentation in advance to form the paperboard belt with the cylinder holes to be standby; the paperboard belt is stuffed in a void between a packaging box and a packaged object so that the two sides of the cylinder holes in the paperboard belt are respectively retained against the inner wall of the packaging box and the packaged object. Environmental protective material can be used for manufacturing a support-buffer body and filling the void in the packaging box; therefore, a great amount of materials can be saved and favorable support-buffer effect can be realized.