The invention discloses an integrated closed water-cooled heat dissipation device with a wind power converter. The heat dissipation device comprises the converter, a first sensor, a three-way valve, a second sensor and a water-cooled radiator which are all mounted in a tower barrel, wherein a to-be-cooled piece is arranged in the converter; the first sensor, the second sensor and the three-way valve are all arranged in the converter; a water pump is connected to the interior of the converter; the water-cooled radiator is arranged at the top of the converter; the to-be-cooled piece, the water pump, the first sensor, a left port of the three-way valve, a lower port of the three-way valve and the second sensor are sequentially connected to form a loop; and the water-cooled radiator is connected to a right port of the three-way valve and the second sensor. According to the invention, as the converter, the water pump and the water-cooled radiator are integrated into one piece of equipment for integral transportation and installation, the cost is saved; and meanwhile, as the water-cooled radiator is mounted in the tower barrel, pollution of outdoor noise is reduced and the radiating effect of the radiator is enhanced.