The utility model discloses a heat dissipation plate body and sheet copper component for a heat dissipation mould of a notebook computer. The component comprises a heat collecting plate (1) and a sheet copper (2), wherein the heat dissipation plate (1) is a rectangular plate, and a rectangular hole (1a) is formed in the middle of the rectangular plate in the long direction; convex hulls (3) are arranged on both sides of the long edge of the rectangular hole (1a); both sides of the sheet copper (2) are riveted to the lower surfaces of the convex hulls (3) on both sides of the rectangular hole (1a); a baffle (4) is arranged on one side, which is close to the rectangular hole (1a), of each convex hull, and downward bends (5) are respectively arranged on the left side and the right side of the heat dissipation plate (1); mounting journal stirrups (6) are respectively arranged at both ends of the bends (5) on the left side and the right side of the heat dissipation plate (1); mounting holes (7) are formed in the mounting journal stirrups (6). The component has the advantages of reasonableness in design, simple structure, easiness in implementation, convenience in use and assembly, good assembly intensity and good heat dissipation effect.