“齐之法化”四字刀是春秋战国时期(公元前770年-公元前221年)齐国所铸刀币。形制大体与三字刀相近,但因与初始刀货更加相近,故刀刃部无高挺边廓,刀背厚实,背廓在刀身与刀柄衔接处断开,俗称“断缘”。由此可显现出原始刀削遗迹。“齐之法化”四字刀比三字刀稍大,长约18.3厘米左右,重约45克上下,大小轻重稍有出入。背面三道横纹下多铭一或二字,可见: “Qi of the law of” four-word knife is the Spring and Autumn Period (BC 770 - 221 BC) Qi State coins coins. The shape is generally similar to the three-word knife, but because it is more similar to the original knife, the edge of the knife has no high profile and the blade has a thick back. The back is broken at the joint of the blade and the handle, commonly known as the broken edge. This shows the original cutting trace. “Qi of law ” four-word knife slightly larger than the word knife, about 18.3 centimeters, weighing about 45 grams up and down, the size of a slight discrepancy. The back of three stripes under Ming Ming or two words, can be seen: