The invention relates to a novel inflatable metal particle research device. The device comprises a metal particle adding unit and an organic glass tank body, wherein the metal particle adding unit is located in the organic glass tank body; the metal particle adding unit comprises rotating handles, rotating sealing rings, a grooved electrode and a thin metal cover; the rotating sealing rings are used for guaranteeing the airtightness of the device; one rotating handle is connected with the grooved electrode through a rotating rod; the grooved electrode is connected with the thin metal cover and can cause relative sliding, so that metal particles are selected and added. With the adoption of the device, particles of various specifications can be selected and added without dismounting the sealing tank body and can be recovered after being researched. The whole research device mainly comprises the organic glass sealing tank body, the metal particle adding unit and a rotating distance-adjusting plate electrode; bases can be adjusted vertically. The device can be applied to research on the kinetic characteristic and the discharge characteristic of the metal particles in gas media.