The invention relates to a power generation device for a highway deceleration strip. The power generation device comprises the deceleration strip, a first straight rod connected with the deceleration strip, a second straight rod hinged to the first straight rod, a first shaft, a second shaft, a third shaft, a
hydraulic cylinder, an energy accumulator, a
pressure sensor, an
electromagnetic flow control valve and a hydraulic
oil tank; the second shaft is sequentially provided with a first
ratchet wheel, a first gear, a second
detent and a second
ratchet wheel, and the first shaft is provided with a first
detent which is internally meshed with the first
ratchet wheel and a second gear which is externally meshed with the first gear; a
clutch is arranged between the second shaft and the third shaft, and the third shaft is provided with a planar
volute spring, a one-way gear and a rotation speed sensor; the one-way gear is meshed with a third gear which is connected with an
electric generator; the
pressure sensor and the rotation speed sensor are electrically connected with the
clutch, and the rotation speed sensor is electrically connected with the
electromagnetic flow control valve. According to the power generation device for the highway deceleration strip, energy of the deceleration strip is bidirectionally recovered by applying the one-way driving characteristic of the ratchet wheels, a hydraulic
system is utilized to control the energy releasing time of the
volute spring, and the purpose of saving the energy is achieved.