The invention discloses an adjusting method for stabilizing current of a parallel direct current resource. In a multi-module parallel current source system, a feedback signal is acquired by detecting the total output current and the total output current can be adjusted by controlling arbitrary appointed main control unit, so as to achieve the purpose of high-precision stabilizing current. The system comprises at least two direct current source parallel units, wherein all the parallel units are electrically connected through a three-phase uncontrolled rectification module, a high-frequency inversion module, a high-frequency transformer and a double-current rectification module in turn; the output current is 0-2500A and is continuous and adjustable; any one of the parallel units is chosen as a host machine; the other parallel units which are not appointed as the host machine independently work according to a manually preset given value; and the appointed host machine is used for receiving a feedback signal output by a high-precision current detection device, comparing with a given current value of the system and dynamically and precisely adjusting the output current of the host machine, so that the total output current of the whole system is stabilized in an appointed current scope.