The utility model discloses a mounting plate for the heat dissipation sheet copper of a notebook computer. A rectangular plate is formed by punching a dip galvanizing steel plate, and sinking platforms (1) are respectively arranged at four corners of the rectangular plate; a sheet copper welding zone (2) is arranged in the middle of the front surface of the rectangular plate; a bar-shaped groove (3) vertically penetrating through the sheet copper welding zone is formed in the right-and-left central position of the sheet copper welding zone, and flanged edges (4) which are in the coherent extending direction with the bar-shaped groove and face to the back surface are respectively arranged on the two side edges of the bar-shaped groove; press lines are respectively arranged in the sheet copper welding zone and a heat transfer pipe welding zone; reinforcing ribs (6) around the sheet copper welding zone are arranged on the outer side of the sheet copper welding zone, and different error assembly resistant serial numbers (A) are carved in the positions, which are close to the four mounting holes, of the reinforcing ribs. The mounting plate has the advantages of simple structure, reliable intensity, and convenience in mounting, and increases the welding steadiness of the heat dissipation sheet copper and the heat dissipation pipe. The mounting plate has the error assembly resistant functions.