A measurement device for a full-shielding high-voltage current comprises a left shell (2) and a right shell (3) forming a ring-shaped shielding chamber (1); a test core line hole (4) is arranged at a top end of the right shell (3), and a switching hole (5) for accommodating a pressing switching mechanism is arranged at a bottom end of the right shell (3), and an infrared hole (6) for letting through an infrared ray and a push rod hole (7) for letting through a first push rod (11) of the pressing switching mechanism are arranged on an inner ring wall of the ring-shaped shielding chamber (1), and the push rod hole (7) is located right above the switching hole (5); a ring-shaped printed circuit board with a detected signal analysis and processing circuit is arranged inside of the ring-shaped shielding chamber (1), and a circular printed circuit board with a detected signal transmission circuit is arranged inside a space surrounded by the inner ring wall of the ring-shaped shielding chamber (1). Through full shielding and electrical independence, the measurement device can measure a high*voltage current conveniently, securely, reliably and accurately, can send test data remotely, eliminate the inconvenience and hidden troubles caused by human eye reading, avoid the occupation of personnel and improve the working efficiency.