The invention discloses a building method for hybrid high-yield tea-oil trees and relates to the technical field of economic forest plantation. A hybrid row with interplanted hybrid plants is arranged at intervals of each two to five rows of tea-oil trees in the tea-oil tree forest; a hybrid plant is planted at intervals of each two to five tea-oil trees in the hybrid row; the rest is conducted as the same. A building process comprises steps of first, selecting a forest land, second, applying fertilizers to the land, third, tidying the forest land soil after fertilizer application, fourth, digging caves, fifth, transplanting and sixth, managing the forest, wherein the second step comprises primary fertilizer application, second fertilizer application and third time fertilizer application. The building method is characterized by improving pollination conditions and increasing tea-oil tree yield; and the method can be applied to novel tea-oil hybrid forest planted in barren hills suitable for forestation with gradient of 15 degrees.