The invention relates to an impulse type mist spraying cooling device and an impulse control method. A simulation heat source is fixedly arranged in an airtight chamber, the simulation heat source iscomposed of a heated copper block heat sink electric heater, water in a thermostatic waterbath in a circular water part is connected with a filter through a micro-pump, deionized water coming from thefilter enters the chamber after passing through a solenoid valve, a jet pump is connected with a nozzle, the nozzle is fixed on a nozzle bracket, the height and inclined angle of the nozzle are adjusted by adjusting the nozzle bracket, the jet pump controls jet pressure, the nozzle is located directly above the simulation heat source, a data acquisition instrument collects the temperature of thesimulation heat source and sends the temperature of the simulation heat source to a computer, and the computer conducts impulse type mist spraying cooling on the simulation heat source by conducting on-off frequency control on the solenoid valve. The thickness of the liquid film formed on the heating surface within the impulse type mist spraying cooling average time is thinner, the thermal resistance decreases, impulse type mist spraying cooling can be adjusted by changing the mass flow rate, the duty ratio and the frequency, so that the heating surface achieves an actual needed temperature.