The invention provides a nickel-base alloy comprising the following components in percentage by weight: 7-8% of cobalt, 6.75-7.25% of chromium, 6.25-6.55% of aluminum, 6.3-6.7% of tantalum, 5.25-6.75% of tungsten, 0.3-0.7% of molybdenum, 0.12-0.18% of hafnium, 2.35-2.75% of rhenium, 0.04-0.06% of carbon, 0.003-0.005% of born and the balance of nickel. By balancing the contents of strengthening elements of W, Mo, Ta, Al, Co and the like in the alloy, reducing the content of W, increasing the content of Al and adding Re, the nickel-base alloy is relatively low in density and relatively good in comprehensive performance.