In order to study the grain growth behavior of a new-type nickel-base superalloy at elevated temperature， grain growth tests are carried out of Haynes 282 alloy within the holding temperature range from 973 to 1 373 K and holding time range from 0 to 10 800 s.The influence of the insulation time and insulation temperature on the grain size is analyzed， and the evolution law of the grain size under the experimental conditions is studied.The mathematical model of grain growth of Haynes 282 alloy is constructed， which can effectively characterize the grain growth behavior of Haynes 282 alloy at high temperature.