A direct current circuit breaker handcart, comprising: a support frame, comprising a support surface; a current carrying element, located on the support surface, and comprising a main circuit breaker and an auxiliary circuit breaker that are electrically connected with each other; a commutation element, located on the support surface, electrically connected with the current carrying element, and comprising a commutation capacitor, a commutation inductor, a commutation switch assembly, and a commutation capacitor charger that are electrically connected with each other; a repulsive assembly, configured to control opening and breaking off of the main circuit breaker; and an energy absorbing element, located on the support surface, and electrically connected with the current carrying element and the commutation element, respectively; wherein the support frame comprises a first end and a second end that are opposite in a first direction, and the main circuit breaker and the auxiliary circuit breaker are located at the first end, and are spaced apart from each other in a second direction, the first direction and the second direction are parallel to the support surface, and the first direction is perpendicular to the second direction, the main circuit breaker comprises a main switch and a first contact arm, the auxiliary circuit breaker comprises an auxiliary switch and a second contact arm, and the first contact arm and the second contact arm both extend in the first direction and in a direction pointing from the first end to the second end, wherein one end of the first contact arm close to the first end is connected with one end of the main switch, and one end of the second contact arm close to the first end is connected with one end of the auxiliary switch, the other end of the main switch is electrically connected with the other end of the auxiliary switch through a conductive element, and both the first contact arm and the second contact arm are farther away from the support surface in a third direction than the conductive element, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction. a support frame, comprising a support surface; a current carrying element, located on the support surface, and comprising a main circuit breaker and an auxiliary circuit breaker that are electrically connected with each other; a commutation element, located on the support surface, electrically connected with the current carrying element, and comprising a commutation capacitor, a commutation inductor, a commutation switch assembly, and a commutation capacitor charger that are electrically connected with each other; a repulsive assembly, configured to control opening and breaking off of the main circuit breaker; and an energy absorbing element, located on the support surface, and electrically connected with the current carrying element and the commutation element, respectively; wherein the support frame comprises a first end and a second end that are opposite in a first direction, and the main circuit breaker and the auxiliary circuit breaker are located at the first end, and are spaced apart from each other in a second direction, the first direction and the second direction are parallel to the support surface, and the first direction is perpendicular to the second direction, the main circuit breaker comprises a main switch and a first contact arm, the auxiliary circuit breaker comprises an auxiliary switch and a second contact arm, and the first contact arm and the second contact arm both extend in the first direction and in a direction pointing from the first end to the second end, wherein one end of the first contact arm close to the first end is connected with one end of the main switch, and one end of the second contact arm close to the first end is connected with one end of the auxiliary switch, the other end of the main switch is electrically connected with the other end of the auxiliary switch through a conductive element, and both the first contact arm and the second contact arm are farther away from the support surface in a third direction than the conductive element, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.