The invention provides a cooling air condition coolant flux real-time control method and an apparatus thereof, wherein the method comprises that a first starting step of an expansion valve is calculated; if the actual operation of a compressor is operated at full load, the machine liquid-supplying amount is controlled according to the first starting step of the expansion valve; if the actual operation of the compressor is operated at part load, a second starting step or a corrected value of the expansion valve is calculated according to the first starting step of the expansion valve; and then the machine liquid-supplying amount is controlled according to the second starting step or the corrected value of the expansion valve. According to the invention, the starting step of the expansion is calculated when the compressor is operated at actual load; the real-time adjustment to the opening degree of an electronic expansion valve is carried out, so as to achieve the goal of accurately controlling the coolant flux of the system; and the cooling air condition coolant flux real-time control method has the advantages of more accurate control, and reliable and stable running of the machine components.