The invention relates to a dual-phase butting ultra-magnetostrictive self-sensing driving direct force feedback servo valve, belonging to the servo control field. Two single-magnetostrictive drivers with completely identical structure and dimension are symmetrically arranged at two sides of an output component by a butterfly spring, thus forming the self-sensing driver of dual-butting structure and using a single-DOF flexible hinge mechanism for realizing the amplification and transmission of output displacement. A direct force feedback servo valve is formed by a flexible hinge pushing rod with displacement amplification function and a power-step sliding valve. By virtue of the self-sensing function of the driver, a dynamic balance separation signal circuit controlled by a DSP singlechip detects the output signals in real-time, realizes the real-time control and precise positioning on the driving object, can be used for driving control and sensing detection system of precise displacement, velocity and accelerator and force, integrates the driving and sensing detection function into a whole body, and is especially suitable to water pressure transmission and control field.