A preparation method of nickel-based wrought superalloy wheel disk forgings used at high temperature, characterized by comprising following steps: Step 1: weighing raw materials according to a composition proportion wherein the raw materials comprise by weight percentage: C: 0.01~0.08%, W: 6.5~8.0%, Cr: 7.5∼11.0%, Mo: 1.5~3.5%, Co: 14.5~17.5%, Ti: 1.0~2.0%, Al: 4.0~5.5%, Nb: 1.0~2.0%, Zr: 0.005~0.05%, Mg: 0.005~0.05%; Ce: 0.001~0.05%, B: 0.005~0.05% and Fe: 0.01∼1.5%, and balance of Ni; and the raw materials further comprise impurity elements: P≤0.015%, Mn≤0.5%, Si≤0.5%, S≤0.015%, O≤0.005%, N≤0.01%, Ag≤0.005%, Ca≤0.01%, Sn≤0.01%, Pb≤0.001%, Cu≤0.5%, Ta≤0.5% and V≤0.5%; step 2: smelting the raw materials into a primary alloy ingot by vacuum induction smelting comprising the following steps of: evacuating, smelting, refining and tapping, demoulding, subjecting the primary alloy ingot to high-temperature stress relief annealing and electroslag remelting refining to obtain a secondary alloy ingot, demoulding, subjecting the secondary alloy ingot to low-temperature stress relief annealing and vacuum consumable remelting refining to obtain a tertiary alloy ingot, thereby obtaining an alloy ingot; step 3: performing high-temperature homogenizing annealing on the alloy ingot obtained in Step 2 to obtain a high-temperature homogenizing annealed alloy, wherein the high-temperature homogenizing annealing comprises heating, heat preservation and cooling processes, the heating rate is controlled to be 15-60 °C/h, the temperature of the heat preservation is 1150-1250 °C, and the time of the heat preservation is 24-72 h; and the cooling rate is controlled to be 5-55 °C/h; and performing heating, forging and cogging on the alloy to obtain a bar, and subjecting the bar to high-temperature homogenizing annealing to obtain wheel disk forgings; step 4: cutting the bar obtained in Step 3 according to the weight of the wheel disk forgings to obtain a cut bar, and subjecting the cut bar to blank making and die forging to obtain an alloy wheel disk forging, wherein the weight of the cut bar is 115-145% of the weight of the wheel disk forging, the height-diameter ratio of the cut bar is controlled to be 1.5-3.0; and step 5: performing heat treatment on the alloy wheel disk forgings obtained in Step 4 to obtain nickel-based wrought superalloy wheel disk forgings used at high temperature, wherein the heat treatment comprises a solid solution treatment, an intermediate aging treatment and an aging treatment, the solid solution treatment method comprises performing heat preservation at 1150-1220 °C for 2-10 h, the intermediate aging treatment method comprises performing heat preservation at 1000-1150 °C for 2-10 h; and the aging treatment method comprises performing heat preservation at 760 °C-920 °C for 8-32 h. Step 1: weighing raw materials according to a composition proportion wherein the raw materials comprise by weight percentage: C: 0.01~0.08%, W: 6.5~8.0%, Cr: 7.5∼11.0%, Mo: 1.5~3.5%, Co: 14.5~17.5%, Ti: 1.0~2.0%, Al: 4.0~5.5%, Nb: 1.0~2.0%, Zr: 0.005~0.05%, Mg: 0.005~0.05%; Ce: 0.001~0.05%, B: 0.005~0.05% and Fe: 0.01∼1.5%, and balance of Ni; and the raw materials further comprise impurity elements: P≤0.015%, Mn≤0.5%, Si≤0.5%, S≤0.015%, O≤0.005%, N≤0.01%, Ag≤0.005%, Ca≤0.01%, Sn≤0.01%, Pb≤0.001%, Cu≤0.5%, Ta≤0.5% and V≤0.5%; step 2: smelting the raw materials into a primary alloy ingot by vacuum induction smelting comprising the following steps of: evacuating, smelting, refining and tapping, demoulding, subjecting the primary alloy ingot to high-temperature stress relief annealing and electroslag remelting refining to obtain a secondary alloy ingot, demoulding, subjecting the secondary alloy ingot to low-temperature stress relief annealing and vacuum consumable remelting refining to obtain a tertiary alloy ingot, thereby obtaining an alloy ingot; step 3: performing high-temperature homogenizing annealing on the alloy ingot obtained in Step 2 to obtain a high-temperature homogenizing annealed alloy, wherein the high-temperature homogenizing annealing comprises heating, heat preservation and cooling processes, the heating rate is controlled to be 15-60 °C/h, the temperature of the heat preservation is 1150-1250 °C, and the time of the heat preservation is 24-72 h; and the cooling rate is controlled to be 5-55 °C/h; and performing heating, forging and cogging on the alloy to obtain a bar, and subjecting the bar to high-temperature homogenizing annealing to obtain wheel disk forgings; step 4: cutting the bar obtained in Step 3 according to the weight of the wheel disk forgings to obtain a cut bar, and subjecting the cut bar to blank making and die forging to obtain an alloy wheel disk forging, wherein the weight of the cut bar is 115-145% of the weight of the wheel disk forging, the height-diameter ratio of the cut bar is controlled to be 1.5-3.0; and step 5: performing heat treatment on the alloy wheel disk forgings obtained in Step 4 to obtain nickel-based wrought superalloy wheel disk forgings used at high temperature, wherein the heat treatment comprises a solid solution treatment, an intermediate aging treatment and an aging treatment, the solid solution treatment method comprises performing heat preservation at 1150-1220 °C for 2-10 h, the intermediate aging treatment method comprises performing heat preservation at 1000-1150 °C for 2-10 h; and the aging treatment method comprises performing heat preservation at 760 °C-920 °C for 8-32 h.