PCBA board convenient for heat dissipation

The utility model is suitable for the technical field of circuit boards, provides a PCBA board convenient for heat dissipation, and solves the problems that the heat dissipation range of a heat dissipation thin copper sheet of an existing device is limited, and the use requirements of PCBA boards of different models cannot be met. Comprising a double-layer PCBA composition board, the double-layer PCBA composition board comprises a working bottom board and a working core board connected with the working bottom board, and the working bottom board and the working core board are used for display control work of a display screen; the combined plate connecting piece is used for connecting and supporting a working bottom plate and a working core plate, the auxiliary heat dissipation mechanism is used for assisting the double-layer PCBA combined plate to work, and the auxiliary heat dissipation mechanism is detachably installed on the working core plate; according to the embodiment of the utility model, the auxiliary