The utility model discloses a photovoltaic power plant pile foundation drilling equipment and drilling rod thereof. The centibar top of drilling rod is equipped with the native baffle of fixing on centibar and/or helical blade of sweeping, and the outer end overhang of sweeping native baffle is beyond helical blade's periphery, and the outer end of sweeping native baffle has and meets the native face of sweeping that creeping into of centering pole turned to. Like this when drilling depth reaches required pile foundation bore depth and spends, sweep native baffle can the block in the hole in pile foundation hole along last, so not only can be convenient for survey and control the drilling depth of rig, and along with sweeping the drill way rotation of native baffle in the pile foundation hole, it can outwards clean the dregs of piling up in the drill way position in pile foundation hole to sweep native baffle, in order to realize repairing the hole operation in the drill way in pile foundation hole, so that clean ground drill way edge and pile up, the problem that wastes time and energy in the hole is repaiied in the manual work in having avoided follow -up construction.