The invention relates to a breathable waistcoat. The breathable waistcoat comprises a waistcoat body, a rubber pipeline, an exhausting groove, a turbocharged fan, a cold storage chamber, a power supply and a control switch, wherein the rubber pipeline is arranged in the waistcoat, one side of the rubber pipeline is provided with the exhausting groove, the turbocharged fan is arranged on the otherside of the rubber pipeline, arranged at one corner of the lower portion of the waistcoat body and connected to the waistcoat body, the cold storage chamber is connected with the turbocharged fan, a detachable box body is arranged in the cold storage chamber, a liquid coolant is arranged in the box body, the rubber pipeline is communicated to the inside of the cold storage chamber, the power supply and the control switch are both connected with the turbocharged fan, and the control switch controls startup and shutdown, air volume and working time of the turbocharged fan. The breathable waistcoat is simple in structure, convenient to wear, capable of achieving ventilation and cooling and discharging heat and sweat, high in comfort and low in production cost.