Vehicle bonnet hinge

A vehicle bonnet hinge is provided, which includes a hinge arm (10) having penetratingly formed coupling holes (11) to be coupled with a bonnet in contact with a bottom surface of the bonnet at a top surface, and a first hinge hole (12) and a second hinge hole (13) penetratingly formed at a front part and a rear part of a surface of the hinge arm, a first link (40) and a second link (50), of which upper end parts are respectively coupled with the first hinge hole (12) and the second hinge hole (13) of the hinge arm by axial pins (31), a hinge support (20) formed with a hinge hole (22) at a side to be rotatably coupled with a lower end part of the second link (50) by the axial pin and coupling holes (21) at both sides of a lower part to be coupled with a vehicle body by bolts in contact with a top surface of the vehicle body at a bottom surface, a slot (60) formed longitudinally in the hinge support (20) for preventing a hinge pin (30), which is coupled with the lower part of the first link (40), from deviating from a hinge center shaft when an external impact is applied, and a plate spring (70) fixedly mounted at a side of the slot (60), and formed with a holding shoulder (71) for preventing the hinge pin (30) from deviating from a normal hinge operation position, wherein the lower end part of the first link (40) moves along the slot (60) in case of head-on collision between a vehicle and a walker, so that the bonnet moves downwardly for absorbing the impact energy, preventing the walker from being injured.