Nickel-based superalloy GH4700 ingots of vacuum-induction-melting and electroslag-remelting were prepared and their dendrite morphology, segregation and precipitation were investigated. Kinetic homogenizing curves were calculated by Dictra software through a residual segregation parameter model. Based on the theoretical results, five homogenizing treatments were tested and validated by microstructural analysis and thermal compressions. The results show that Nb and Ti are the principal segregated elements of GH4700 ingots. The precipitated phases of casting ingots include γ, γ′, Laves and primary carbide. After homogenization at 1170 oC/48 h, the segregation of elements Nb and Ti are almost eliminated. The phase of Laves, which is detrimental to plasticity, dissolves to the matrix. GH4700 alloy exhibits excellent workability after homogenizing heat treatment