The invention discloses a drone water sampling device for water quality monitoring. The device comprises a water intake pipe, a transfer pump, a water filling pipe and several sample storage devices. The several sample storage devices are uniformly distributed on a ring support, the inner side of which is provided with a tooth ring. The tooth ring is engaged with driving wheel, which is connected with a driving motor in a transmission way. The water intake pipe is communicated with the water filling pipe through the transfer pump. A water outlet of the water filling pipe is directed at one of the sample storage devices. The driving motor drives the ring support to rotate through the driving wheel. When the ring support rotates a certain angle, the water outlet of the water filling pipe is directed at another sample storage device. The transfer pump and the driving motor are both fixed on a pedestal, which is connected to a drone. By using the drone as a platform, acquisition of a water area's water samples to be observed can be rapidly completed, water samples of multiple sampling points can be acquired by one-time lift-off, and the platform is not directly contacted with the water surface so as to guarantee cleanness of the platform.