The invention discloses a stainless steel alloy for a golf ball head. The stainless steel alloy for the golf ball head is characterized by comprising the following components in weight percentages: 1-2% of manganese, 1-2% of silicon, less than 0.08% of carbon, 6-8% of nickel, 16-18% of chromium, 2-4% of copper, more than 0.2% of nitrogen, and the balance of iron. Hardness HRB (Rockwell hardness B-grade scale) value of the stainless steel alloy consisting of the components is 70-80. The stainless steel alloy is one type of stainless steel, is good in abrasive resistance, and has a better shocking-proof performance when being struck than stainless steel #304 or low carbon steel #8620, and the harness is HRB70-80. When struck at the same time, a golf ball and the ball head face have long contact time, the ball control performance is good, and the stainless steel alloy is applicable to a pull rod, an iron rod and a wedge. The stainless steel alloy has good hardness and abrasive resistance, the ball head is not easily deformed, and a groove of the ball face is difficult to abrade, so that the stainless steel alloy is an excellent golf ball head material.