The present invention relates to a method for manufacturing a wood section material, especially with respect to soft wood section material and its manufacturing method. It belongs to the wood processing field. This invention is achieved by the following technical plans: a type of wood section material manufacturing method includes the following steps: (1) wood preparation; (2) drying; (3) polishing; (4) hot pressing, which is to use two hot pressing boards with 140-200 °C to firmly press two surfaces of panel blank material; (5) pre-carbonization, which pre-carbonizes the panel blank material under 160 ∼ 200 °C; (6) carbonization, which carbonizes the panel blank material under 200 ∼ 225 °C; (7) cooling; (8) moisture content control. This invention is particularly suitable to make wooden floor boards and office furniture.