The invention discloses an energy-saving direct current motor test system which comprises an armature rectifier power supply, a tested direct current electric motor excitation power supply, an accompany tested direct current power generator excitation power supply, a tested direct current electric motor, an accompany tested direct current power generator, a direct current voltage gauge, a direct current ammeter and a 380V alternating current power supply; the armature lines of the tested direct current electric motor and the accompany tested direct current power generator are connected in the same polarity; the armature rectifier power supply is connected to an armature on the same end of the negative poles of the tested direct current electric motor and the accompany tested direct current power generator; the tested direct current electric motor is connected with the positive pole end of the accompany tested direct current power generator; the tested direct current electric motor excitation power supply is connected with a tested direct current electric motor excitation coil; and the accompany tested direct current power generator excitation power supply is connected with the accompany tested direct current power generator excitation coil. The energy-saving direct current motor test system has the advantages of simple structure, convenience in operation, energy saving, environmental protection, low price and high safety, and can test a motor with higher power with a small-capacity power supply.