Multi-station external-clamping-type simulation migration testing tank

The invention relates to a multi-station external-clamping-type simulation migration testing tank which comprises a testing tank main body and a bracket. The testing tank main body is arranged on the bracket; the testing tank main body comprises a liquid charging hole cover, an accommodating tank and an external-clamping-type fixture; the external-clamping-type fixture consists of an upper clamp plate, a lower clamp plate, clamping bolts and nuts; the upper clamp plate is clamped in the accommodating tank; four peripheral sides of the upper clamp plate are provided with four open slots; a liquid catheter is arranged outside the bottom surface of the accommodating tank; the liquid catheter is communicated with an inner cavity of the accommodating tank; three through holes are uniformly formed on the upper clamp plate along the central axis; the liquid catheter passes through any one through hole; the liquid charging hole cover is screwed on the liquid catheter of the upper clamp plate; the accommodating tank i