Planting hole digger

The utility model discloses a planting hole digger which comprises more than one group of supporting rods and a connecting rod arranged between the supporting rods, a fixing plate is sleeved outside the supporting rods, a motor is arranged inside the fixing plate, a drill bit is arranged at the output end of the motor, more than one group of grooves are arranged inside the fixing plate, and the connecting rod is arranged in the groove. Two sets of bearings are installed outside each set of supporting rods, rotating shells are arranged outside the two sets of bearings, limiting blocks are installed outside the rotating shells, and the supporting rods, the connecting rods, the fixing plates, the motors, the drill bits, the grooves, the bearings, the rotating shells and the limiting blocks are matched with one another; the supporting rods can play a role in supporting the fixing plate, so that workers can conveniently dig pits, and meanwhile, the supporting rods can be driven to synchronously move in the process