The invention relates to the technical field of surgical instruments, and discloses an automatic
locking mechanism device of a surgical
retractor, which comprises a supporting frame, an arc-shaped supporting plate is fixedly connected to the supporting frame, a locking
hook plate is arranged on the outer side of the arc-shaped supporting plate, and a locking hook is arranged on the locking
hook plate. A locking connecting
assembly is arranged on the locking
hook plate and comprises a bottom driving seat, an
insertion pair locking frame, a telescopic locking rod, a rotary
position control piece and a pressing locking piece; in the
surgery progress process, according to the environment condition in a wound, the position of the rotary
position control piece can be rotated, the epidermis position of the locking hook is loosened or tightened, when the rotary
position control piece moves, the locking hook plate abuts against the opposite hook straight rod to move, the movement direction is detected and displayed in time, it is guaranteed that the locking hook plate tends to be used in the correct direction, and the operation efficiency is improved. And the influence of contact between the hook part and the
skin contact position is controlled, so that the internal wound is convenient to clean, and the possibility of reappearing operation is reduced.