Ammonia nitrogen tester with leak-proof function

The utility model discloses an ammonia nitrogen tester with an anti-leakage function, which comprises a box body, a placing frame and protective cotton arranged on the left side and the right side of the lower end in the box body; the ammonia nitrogen tester main body is arranged in the box body; the sealing assembly is arranged above the box body; the placing assembly is mounted on the right side of the box body; the placing assembly comprises a supporting seat; the rotating shaft is arranged in the supporting seat in a penetrating manner; the placing frame is mounted at one end of the rotating shaft; the limiting block is arranged below the supporting seat; and the detection bottle is arranged in the placement frame in a penetrating manner. According to the ammonia nitrogen tester with the leakage-proof function, when the ammonia nitrogen tester is used, an operator can flatly place the placement frame and place detection bottles filled with liquid to be detected on the placement frame, so that the bottle o