The invention discloses an electric flux detection device comprising left and right test tanks, wherein liquid inlets are arranged above both the test tanks, one sides of the liquid inlets are provided with wire outlets, terminals are provided above both the test tanks, the corresponding positions of the side surfaces of the left and right test tanks are both provided with copper plate electrodes,a plurality of drainage holes are arranged on the copper plate electrodes, power cords run through the interior of the wire outlets, one ends of the power cords are connected to the rear portions ofthe copper plate electrodes and the other ends are connected to the terminals, four corners of the side surfaces of the test tanks are respectively provided with through holes, the copper plate electrode are fixed at the side surfaces of the test tanks by upper, lower, left and right sunk screws, and a ring of annular mounting groove is spaced around the copper plate electrodes at 2cm. The deviceis in an integrated structure, can be operated by a single person to realize the test of electric flux detection of the concrete samples, and can ensure the accuracy of the test.