The invention belongs to the technical field of electric engineering, and in particular relates to a current interruption experimental platform of a direct-current circuit breaker. The current interruption experimental platform of the direct-current circuit breaker in the invention has the benefits that: the experimental platform comprises an impact current generation device, a direct-current charging power supply U, a direct-current circuit breaker test object S, a loop resistor R1 and an unloading circuit, which are connected in sequence; the impact current generation device is used for generating current shock pulse; the experimental platform is low in test loop inductance and resistance; the test current is up to 25 kA; the closing time of the K21 is steady; the stability is within +/-0.2 ms; the voltage and current measurement analog bandwidth is greater than 10 MHz; the flatness is 3%; measurement of current from 25 kA to 150 mA can be completed; the amplitude range is wide; capacitors in capacitance tower layers are connected in parallel; layers can be in series and in parallel; multiple combinations of the capacitors can be completed; the experimental operation is easy; andthe experimental risk and the security risk are low.