The invention provides a heat dissipation structure of a power supply, which comprises a main shell, a heat dissipation fan, a battery panel, a battery panel mounting plate, a heat conduction silica gel sheet, a heat dissipation shell, a mounting frame, a buffer spring, a battery panel driving circuit board, a water tank, a water pump, a semiconductor chilling plate and a temperature sensing element, hollow cell panel mounting plates are arranged at the positions, close to the upper end and the lower end, of the mounting frame in the main shell, the cell panel mounting plates are slidably connected with the mounting frame, cell panel mounting positions are arranged on the inner sides of the cell panel mounting plates, heat conduction silica gel sheets are fixed in the cell panel mounting positions, and the ends of cell panels are mounted in the cell panel mounting positions. A battery panel driving circuit board is fixed in the main shell, a water pump and a semiconductor chilling plate are fixed in the water tank, the output end of the water pump is communicated with a battery panel mounting plate at the top, the battery panel mounting plate at the bottom is communicated with the water tank through a hose, and a mounting frame is sleeved with a buffer spring. The heat dissipation and shock absorption effects are good.