The invention discloses an insulated core transformer type electronic irradiation accelerator installation process comprising the steps of installing a high-voltage power source and an accelerator body on an accelerator bracket and connecting the high-voltage power source and the accelerator body through a connecting steel cylinder, wherein the installation process of the high-voltage power source sequentially comprises the steps of installing a power source base, installing a lower yoke, pre-installing a transition plate and a first-layer high-voltage chassis, pre-installing six layers of high-voltage chassis, installing the first-layer high-voltage chassis, installing the other layers of high-voltage chassis, and installing an upper yoke. By installing an insulated core transformer type electronic irradiation accelerator according to the installation process of the invention, the installation precision, work efficiency and qualification rate are high, the installation quality is ensured, and manpower, material and financial resources are saved.