The invention relates to an electrically adjusted self-compensating plug valve which comprises a check ring, a micro-switch, an upper driver shell, a motor, a cam, a circuit board, a valve rod, a bolt, a big sealing ring, a valve body, a valve chip, a spring, a cylinder pin, a power line, a lower driver shell, a small sealing ring and a gasket. A floating type valve core structure is adopted by the electrically adjusted self-compensating plug valve; the valve chip is made of a nylon plastic soft substrate material; a fluid backpressure is utilized as a locking force for sealing the valve; the traditional method for increasing the locking force for sealing a conical surface by increasing an axial force of the valve core is replaced; the universal key technologies of the valve, such as, the sealing property of the plug valve, the self-compensating value after the sealing surface is abraded, the switching torsion moment, and the like, are greatly increased; the structure of a sealing part of the valve core is simplified; the manufacturing and assembling technologies are simple; and the production cost is lowered.