The vertical H-Frame adjustable electromagnet has a magnetic field air gap adjustable unidirectionally, a double yoke structure that forms a closed magnetic circuit with good rigidity, and a vertical magnetic field direction. A sample can also be placed on the lower pole plane for convenience. The vertical H-frame adjustable electromagnet is widely used in Hall effect research, magnetoresistance effect research, and magnetic hysteresis retractable research. The vertical H-Frame adjustable electromagnet can also be used as a torque magnetometer, force method magnetometer, magnetic susceptibility measurement device, magnetic material measurement device, and magnetizer and demagnetizer of magnetic devices. In order to increase the magnetic field strength, the electromagnet can also be equipped with a ferroalloy pole, which can process even magnetic field poles, gradient magnetic field poles, electromagnet rotary tables, electromagnet shields, electromagnet supporting bases, undercarriages, and bottom boxes.