The invention relates to a drainage device of a bird manure simulated liquid. The drainage device is characterized by comprising a clamping mechanism (1), the clamping mechanism (1) is connected with a three-segment drainage groove via a rotary joint (2), the three-segment drainage groove comprises a first drainage groove (6), a second drainage groove (7) and a third drainage groove (8), the first drainage groove (6) is connected with the second drainage groove (7) via a slide rail mechanism (3), the second drainage groove (7) is connected with the third drainage groove (8) via the slide rail mechanism (3), and the first drainage groove (6), second drainage groove (7) and third drainage groove (8) are provided with scales (4) respectively. The total drainage device of the bird manure simulated liquid can be used for researches on influence of the falling manner, position and path of the bird manure simulated liquid on the flashover voltage and electric field distribution.