The invention discloses a municipal garden street lamp fixing device. According to the key points of the technical scheme, the municipal garden street lamp fixing device comprises a base and a streetlamp holder, the base is buried in the ground, one end of the street lamp holder protrudes out of the ground, and the other end of the street lamp holder extends into the ground to be connected with the base; a protruding ring is arranged on the outer side wall of the street lamp holder in a protruding mode and buried in the ground, a plurality of ribbed plates are further evenly distributed on the outer side wall of the street lamp holder, and the two ends of each ribbed plate are connected with the protruding ring and the base correspondingly; and the base and the protruding ring are buriedin the ground, thus connection between the whole of the base and the protruding ring and the ground is stable, and thus a street lamp arranged on the street lamp holder is not prone to toppling over.