The utility model discloses a damping module test device of two kinds of structures, one of them is planted structure and includes that power, switch, first half -bridge power module, second half -bridge power module, load reactance and n wait to try the damping module, and n is the natural number, wherein, structure first, second half -bridge power module is the same, and all including parallelly connected each other resistance, energy -storage capacitor and bridge arm, just first, second half -bridge power module syntropy connects in parallel, after the power was established ties with switch, both ends were connected with the both ends of first half -bridge power module respectively, load reactance and n wait to try the damping module back of establishing ties mutually, both ends respectively with bridge arm output midpoint connection first, second half -bridge power module. This kind of test device can the equivalence reproduce voltage stress, electric current stress and thermal stress under stable state operating mode and the transient state operating mode in a plurality of damping module.