Circuit board heat dissipation device and heat dissipation sound equipment

The utility model provides a circuit board heat dissipation device and a heat dissipation sound box. The circuit board heat dissipation device comprises a circuit board and a heat dissipation assembly. The heat dissipation assembly comprises a heat dissipation device and a fixed heat dissipation piece, the heat dissipation device comprises a first heat dissipation plate and a plurality of second heat dissipation plates, the first heat dissipation plate is connected with the circuit board, the second heat dissipation plates are all connected with the first heat dissipation plate, and the second heat dissipation plates are evenly distributed on the same side of the first heat dissipation plate; each second heat dissipation plate is provided with a first fixing hole, and the fixed heat dissipation piece sequentially penetrates through the first fixing holes and is connected with the circuit board. Heat on the circuit board is transmitted to the second heat dissipation plates through the first heat dissipation pl