The invention provides a quick electrostatic agglomerate separating device and a quick electrostatic agglomerate separating process. The quick electrostatic agglomerate separating device is composed of a pry seat, an oil-water separation tank, an oil-water interface instrument, a water outlet, a gas-liquid separation tank, a liquid inlet, a gas outlet, a pressure gauge, a gas-liquid interface instrument, an adsorption plate, a water outlet, an oil/water transmission pipe, an oil outlet, a transformer, a transformer, a control cabinet, a high pressure introduction hole, a feed oil distributor, an electrostatic coalescence electrode and a discharged oil collecting pipe; a high water cut well liquid enters the gas-liquid separation tank via the liquid inlet; a combustible gas is discharged from the gas outlet and enters the oil-water separation tank; oil and water are separated from each other under the action of gravity, and further separated in an electric field generated by the electrostatic coalescence electrode; and crude oil is output from the oil outlet. Therefore, the problems of low crude oil dehydration rate, high oil content in drainage and high energy consumption are solved, the electric field space is extended and the dehydration time of crude oil in the electric field is prolonged; and as the result, the dehydration efficiency is effectively improved, the electricity consumption in operation is reduced and the production cost is reduced.