The invention provides a flow self-adaptation method of a gas chromatography apparatus based on multidimensional air passages. The method comprises the following steps: 1) starting a gas carrying module for gas supply, completing pipeline cleaning and air evacuation of the gas chromatography apparatus based on the multidimensional air passage; 2) starting a host computer, and configuring the initialization parameters; 3) respectively obtaining a relation between an output signal of an electronic pressure control and corresponding work flow to obtain a standard flow coefficient of 6 paths carrying gas work flow; and 4) when a flow monitoring module monitors that after nth path of work flow Vn deviates V0, sending feedback of the work flow Vn to the host computer, once the host computer monitors that the work flow Vn deviates V0, then automatically starting a correction algorithm for returning the work flow Vn to V0. The invention also provides a flow self-adaptation system of the gas chromatography apparatus based on the multidimensional air passage, which solves the problem of unstable work flow due to internal and external factors.