Water sampling device

The utility model discloses a water sampling device, which relates to the technical field of sampling devices and comprises a bottom frame, universal wheels are arranged at the lower part of the bottom frame, a sampling container main body is fixedly connected onto the bottom frame, a filter screen is arranged inside the sampling container main body, a detachable cover is in threaded connection with the right end of the sampling container main body, and the detachable cover is in threaded connection with the right end of the sampling container main body. A controller is arranged on the bottom frame, and a water pump and an inflation pump are arranged on the bottom frame. Through mutual cooperation of the inflator pump, the air bag, the exhaust pipe and the control valve, the water inlet head can float on the water surface, and the air capacity in the air bag and the buoyancy provided by the air bag can be changed, so that the device is suitable for water inlet heads with different weights, the probability tha