A nail box of nail shooting gun comprises: a nail magazine (11)to provide nail slots(P), a gun ejector(30), a nail-pushing block(21), a nail shell(13). The slot can be suitable for T-shaped, L-shaped or U-shaped nails .In the nail slots (P), there are two grooves (15), respectively, and each of the grooves (15) has an inlay (12). The use of the inlay of structure, significantly reduces wear of slot, improves the entire nail box life, reduces cost and increases the smooth delivery of the nails.