The invention provides a method for controlling blasting construction in a complex environment of the urban subway. The method comprises the steps of firstly dividing a tunnel into a plurality of construction intervals, and dividing each construction interval into three blasting areas of an upper bench, a middle bench and a lower bench; then excavating a wedge-shaped groove in each middle bench; and sequentially carrying out the blasting construction on the middle bench, the upper bench and the lower bench of each construction interval to complete the construction in the construction interval.According to the method, the wedge-shaped grooves are excavated to create an empty surface, the blasting areas are divided, the construction sequence of each blasting area is optimized, and a corresponding blasting method and blasting parameters are formulated according to the characteristics of each blasting area, so that the influence of blasting flystones, seismic waves, air shock waves, blasting noise and the like on a tunnel supporting structure and normal social activities around a construction site is reduced, surrounding buildings and subway supporting systems are protected, the stability of surrounding rocks is effectively controlled, and the water seepage phenomenon is avoided.