The invention discloses a multi-phase body discharge device and method for solid or gaseous substance mixing. The multi-phase body discharge device comprises a discharging chamber, a four-leg bracket,a gas conveying pipeline, an air valve, an air blower, a first filter screen, a second filter screen, a positive electrode and a negative electrode; the discharging chamber fixed on the four-leg bracket is provided with an upper opening and a lower opening, the discharging chamber is divided into an upper part and a lower part which are detachable, the detachable filter screens are sequentially installed on the inner side of a side wall of the discharging chamber from top to bottom, two symmetrical sides of the side wall are provided with the positive electrode and the negative electrode which are adjustable intervals respectively; an opening in the bottom of the discharging chamber is tightly connected with the front end of the gas conveying pipeline; and the air valve is arranged in thegas conveying pipeline, and the tail end of the gas conveying pipeline is connected with the air blower. The boiling type multi-phase body discharge device is not only simple in structure, the operation difficulty is low, the investment of manpower and time can be greatly reduced, the solid particles in the multi-phase body can be recycled, so that the experiment continuity is guaranteed, and theexperiment efficiency is greatly improved.