The invention provides a current sharing method of a spacecraft solar power adjustment module without current detection. The method comprises the following steps: S1, designing a solar power adjustment module in parallel operation; S2, extracting an output current amount of the solar power adjustment module in parallel operation; S3, carrying out current sharing controlling; to be specific, on thebasis of characteristics of the power curve of the solar cell, performing the current sharing controlling only in a voltage stabilization mode of the solar power adjustment module, working at the right side of a maximum power point of the power curve by a solar array in the voltage stabilization mode, and controlling an operating point voltage of the solar cell array to control the output power balancing being current balancing to complete current sharing. The current sharing method has the following beneficial effects: current sharing controlling is realized by introducing the operating voltage of the solar array directly without detection of the output current of the solar power adjustment module, thereby avoiding the complex current detection circuit, making the current sharing controlbe simple and reliable, and lowering the cost.