The invention discloses an insulating material electric resistance experiment plate electrode device for providing dynamic pressure and an insulating material electric resistance experiment method, belongs to the technical field of electrical insulating material dielectric property testing, and fills the blank of a dynamic pressure experiment technology. The device comprises a stepping motor, a gear, an elastic element, a ground electrode, a high-voltage electrode, an insulating spacer, a piezoelectric sensor, a supporting guide rod, an epoxy plate, an oil tank, an A/D conversion module, a computer and a stepping motor control module. The computer control end controls the stepping motor to drive the gear to rotate through the stepping motor control module, the length of the spring is adjusted so as to provide constant pressure or continuously changed pressure set according to a program, the piezoelectric sensor below the ground electrode is transmitted to the A/D conversion module through the signal transmission line, and the A/D conversion module uploads a signal to the computer for displaying the pressure at the control end of the computer in real time and forming a complete feedback control loop. According to the invention, the electrical resistance test of the polymer insulating material under the condition of constant or dynamic pressure change is realized.