The present invention relates to a lighting device height-adjustable street lamp including a lamp post (1), a street lamp (2) installed at an upper end thereof, and a driving device for adjusting the height of the street lamp (2). The street lamp (2) is slidably mounted at the upper end of the lamp post (1). The driving device includes: a decelerator (30) having one end thereof connected to an upper surface of a street light housing (21) and having one end of a wire (28) connected thereto through a pulley (27); and a winch (40) having one end and the other end of a wire (29) connected to a bottom surface of the decelerator. When the wire (29) is wound with the winch (40), the decelerator (30) is descended to pull the wire (28) connected to an upper side thereof so as to ascend the height of the street lamp (2), and when a wire (26) is unwound, the decelerator is ascended by self-weight of the street lamp to lower the height of the street lamp. Accordingly, the height of a street lamp lighting device can be simply adjusted by winding a lighting device installed on an upper end of the lamp post, on the winch with the wire or releasing the wire through the decelerator mounted inside the lamp post, thereby efficiently performing the maintenance work of the lighting device. In addition, the decelerator for adjusting the height of the lighting device can be operated in a simple structure which is engaged with an inner diameter of the lamp post having the inner diameter decreased toward an upper side, thereby improving reliability, having no concern for occurrence of a fault, and improving safety since the winch is fixed and maintained by a latch.;COPYRIGHT KIPO 2019
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