The invention discloses a corrosion-resistant high-strength titanium alloy fastening piece. The corrosion-resistant high-strength titanium alloy fastening piece comprises a first fastening part and asecond fastening part; a cover plate is arranged at the top of the first fastening part; two groups of rectangular openings are formed in the cover plate; a third baffle plate is arranged on each of the sides, close to each other, of the two groups of the openings; a first spring is arranged between two groups of the third baffle plates; a first baffle plate is mounted on each of the two sides ofthe cover plate; each first baffle plate is of a rectangular hollow cavity; first chutes are symmetrically formed in the two side walls in each first baffle plate; a second baffle plate is movably mounted in each first chute; fixing grooves are symmetrically formed in the two side walls of each first baffle plate in the vertical direction; an electric rotating shaft is movably mounted between a group of inner walls of the first fastening part; and first screw threads and second screw threads are symmetrically formed in the two sides of the electric rotating shaft. According to the corrosion-resistant high-strength titanium alloy fastening piece, the cooperated use of the first fastening part and the second fastening part can be applicable to fastening a plurality of components; moreover, the corrosion-resistant high-strength titanium alloy fastening piece is easy to assemble and disassemble, and is time-saving, labour-saving, convenient and quick.