Bottle body blowing machine capable of online detecting whether gas leakage exists in bottle body or not

The invention discloses a bottle body blowing machine capable of online detecting whether gas leakage exists in a bottle body or not. The bottle body blowing machine comprises a machine table, a front die and a rear die. A die cavity is formed in the front die and the rear die. The bottle body blowing machine further comprises a gas leakage detection device used for detecting whether gas leakage exists in the plastic bottle body molded in the die cavity or not. The gas leakage detection device comprises a gas flow channel arranged on the front die or the rear die and communicated with the die cavity. The gas flow channel is connected with a flexible gas pipe. The machine body is provided with a gas detection device which can detect gas in a gas pipe. The gas detection device comprises a support arranged on the machine table. A gas cylinder connected with the gas pipe is arranged on the support. A piston rod of the gas cylinder is connected with a lifting block capable of moving vertically along the piston rod. The support is further provided with a detection switch which can detect the lifting block moving along with the piston rod when the piston rod of the gas cylinder stretches, and the detection switch is electrically connected an alarm arranged on the machine table through a controller of the bottle body blowing machine. The bottle body blowing machine is simple in structure and can online detect whether gas leakage exists in the bottle body molded in the bottle body blowing machine or not.