The invention provides a street lamp cable antitheft fixing device comprising a fixing base which can be fixedly arranged at the bottom end of a street lamp pole. The fixing base is provided with a horizontal penetrating hole used for penetration of a cable. The horizontal penetrating hole is provided with a horizontal guiding surface capable of guiding the cable to move along a horizontal direction. The cable penetrating-out end of the fixing base is provided with a vertical guiding surface capable of guiding the cable to move along a vertical direction. The moving direction of the cable is enabled to be converted into the vertical direction from the horizontal direction by the horizontal guiding surface and the vertical guiding surface. The cable can be prevented from moving along the vertical direction by the horizontal guiding surface, and the cable can be prevented from moving along the horizontal direction by the vertical guiding surface so that the cable cannot be pulled by a stealer even the cable of the wiring port of the street lamp pole is broken, stealing prevention of the cable in the street lamp pole is realized, and thus economic loss caused by stealing of the cable can be avoided and normal power supply of a street lamp can be guaranteed simultaneously. The invention also provides the street lamp pole with the street lamp cable antitheft fixing device.