Rapid testing device for ammonia nitrogen in water body

The utility model discloses a rapid testing device for ammonia nitrogen in water, which comprises a shell and a detection part, the detection part is arranged in the shell, a water inlet pipe and a water outlet pipe are respectively arranged on the detection part, the water inlet pipe is communicated with the water outlet pipe through the detection part, and a filtering mechanism is arranged on the water inlet pipe; the filtering mechanism comprises shells, a frame body and a filtering part, the filtering part is mounted in the frame body, and the shells are movably mounted on the left side and the right side of the frame body. By designing the filtering mechanism, impurities in the detected water body can be filtered before detection, and the situation that waste water needs to be treated after detection is avoided. And a plurality of independent filter screens are designed in the filter mechanism, so that when one filter screen needs to be replaced, a new filter screen can be rotated to a filter position fo