The invention relates to an impulse voltage generation module and an impulse voltage generator. The impulse voltage generator mainly comprises multiple modular charging devices and high-voltage resistors. Each modular charging device comprises impulse charging capacitors and gas switches, and the impulse charging capacitors and the gas switches are axially distributed alternately. A ring-type shielding ring is arranged outside each charging device to play shielding and supporting roles. The impulse voltage generation module and the impulse voltage generator can be used for large-capacity test object tests.