Novel cable-stayed bridge stay cable protection device

The utility model discloses a novel cable-stayed bridge inhaul cable protection device which comprises an inhaul cable body, an upper protection sleeve is installed at the top of the inhaul cable body, upper installation bases are symmetrically fixed to the front end and the rear end of the upper protection sleeve, first connecting bases are symmetrically arranged at the left end and the right end of each upper installation base, and a lower protection sleeve is installed at the bottom of the inhaul cable body. Lower installation bases are symmetrically fixed to the front end and the rear end of the lower protection sleeve, second connection bases are symmetrically arranged at the left end and the right end of each lower installation base, fixing blocks are installed at the bottoms of the second connection bases, and vertical rods are vertically arranged at the tops of the fixing blocks. A pulling plate drives a limiting rod to be separated from an inner cavity of a limiting groove and stretch a positioning s