The invention relates to a convenient-to-clean plankton sampler, and belongs to the field of marine exploration and development. The convenient-to-clean plankton sampler comprises a sampling device and a cleaning device, and the sampling device is mounted on the cleaning device; the sampling device comprises an upper cover plate, a frame, a first wall surface, a revolving door, a second wall surface, a third wall surface, a fourth wall surface, a biological storage barrel, a pressure plate, a pressurizing motor, a temperature control device, a rotating motor, a lower cover plate and a handle;the cleaning device comprises a rotating disc, a cleaning barrel and a bearing; the lower end of the frame is clamped into the rotating disc of the cleaning device; the handle is rotated by a hand torotate the frame, and the frame is enabled to rotate along with the rotating disc relative to the cleaning barrel of the cleaning device; debris such as alga on the outer sides of the frame, the firstwall surface, the second wall surface, the third wall surface and the fourth wall surface is conveniently cleaned by bristles on the cleaning barrel; the revolving door, the biological storage barrel, the first wall surface, the second wall surface, the third wall surface and the fourth wall surface are coated with soft films, so that biological samples are in soft contact with the sampling device, and mechanical damage to the biological samples is avoided.