Automatically-controlled casting ladle plug rod opening and closing device

The invention discloses an automatically-controlled casting ladle plug rod opening and closing device. The technical problems that in the prior art, a plug rod opening and closing device is manually operated, operation is dangerous, safety is poor, and the casting quality is affected are solved. The automatically-controlled casting ladle plug rod opening and closing device is arranged on a ladle body; a connecting rod mechanism comprises a vertical connecting rod and a transverse driving connecting rod; the bottom of the vertical connecting rod is hinged to the middle of the transverse driving connecting rod; a hydraulic system device comprises a vertically-fixedly-arranged hydraulic cylinder; a piston rod of the hydraulic cylinder stretches out of the bottom of the hydraulic cylinder, and the end of the piston rod is hinged to the left end of the transverse driving connecting rod; the bottom end of a vertical plug rod is hinged to the right side of the transverse driving connecting rod; the lower portion of