The invention discloses an experimental device for testing a transformer substation current transformer. The experimental device for testing the transformer substation current transformer is characterized in that a rectifying circuit (4) of a charging module (1) is connected with an alternating current power supply interface (3) which is connected with a 220 V alternating current power supply (2) and a filter circuit (5), the filer circuit (5) is connected with a storage battery (10) of a storage battery module (7) through a charging air switch (6), the storage battery (10) is connected with an experiment switch (9) and a direct voltage sampling circuit (11) which is connected with a display screen (12), a P1 port and a P2 port of a current transformer (15) are connected to a positive pole and a negative pole of a direct current power interface (8) which are connected with the experiment switch (9) respectively, and an S1 port and an S2 port of the current transformer (15) are connected to an input port and an output port of a current input interface (14) which are connected with a pointer type ammeter (13) respectively. The experimental device for testing the transformer substation current transformer has the advantages that the labor cost is reduced, the voltage state of the storage battery can be monitored in real time, cycle use of the storage battery is guaranteed, the work efficiency is improved, and the safety and the reliability are achieved.