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Abstract: This paper discusses the simulation experiment for deep charging and discharging process in dielectric materials for a satellite component used in space. Samples were irradiated with mono-energy electrons by using an electron gun and with β ray from a radioactive source. By measuring the current pulses and electric field pulses, the deep dielectric discharging and their effects on the experimental circuit can be studied. Results show that with irradiation of electron beam with a current density of pico-amperes, as is close to that in a real space environment, massive charge may be accumulated in dielectric materials to reach a surface potential of several kilo-volts. The subsequent discharge will generate high amplitude current and electric field pulses, which may heavily disturb the operation signals of the experimental circuit.