Oxygen content measuring device for blue-green algae water body

The oxygen content measuring device comprises a first shell and a ship body, an annunciator is linearly connected to the upper portion of the first shell, a transmission block is arranged on the upper portion of the first shell, the transmission block penetrates through the first shell and is downwards provided with a second wire, the other end of the second wire is provided with a telescopic rod, and the telescopic rod is fixedly connected with the ship body. The other end of the telescopic rod penetrates through the ship body and is downwards provided with a measuring instrument, a sampling groove is formed in the measuring instrument, a containing groove is formed in the ship body, the containing groove and the measuring instrument are consistent in size and correspond to each other, a second guide pipe is arranged on one side of the containing groove, and a sampling box is arranged at the other end of the second guide pipe. An annunciator can remotely control the device, a first water pump is connected wi