The invention discloses an electrical control system of a high and low-altitude operating vehicle. A telescopic arm comprises a three-folded arm, a two-folded arm, a lifting arm and a one-folded arm,a rotary base is rotatably connected to a vehicle body, the one-folded arm is hinged to the rotary base, the lower end of an oil cylinder III is fixedly connected with the rotary base, a piston rod ofthe oil cylinder III is hinged to the one-folded arm, the two-folded arm is hinged to the one-folded arm, an oil cylinder II is fixedly arranged on the one-folded arm, a piston rod of the oil cylinder II is hinged to the two-folded arm, the three-folded arm is hinged to the two-folded arm, an oil cylinder I is fixedly arranged on the two-folded arm, a piston rod of the oil cylinder I is hinged tothe three-folded arm, the lifting arm is hinged to the three-folded arm, an oil cylinder IV is fixedly arranged on the three-folded arm, a piston rod of the oil cylinder IV is hinged to the lifting arm, a detection device is installed on the telescopic arm and the vehicle body, a plurality of support legs are connected with the vehicle body in a sliding mode, and a control unit is connected withthe detection device. According to the electrical control system, the electrical control of the high and low-altitude operating vehicle is realized, and high-altitude operation and low-altitude operation can be realized.