In order to solve the problem that the gangue transport time is too long due to the large size, and then influences the tunneling of the whole roadway, based on the principle of stress wave superposition and the two-step cutting technology, a multi-stage one-time blasting method is proposed. The blasting parameters are optimized, the blasting result is analyzed from Fractal Dimension. After field test and block analysis, it is found that the multi-stage one-time blasting can effectively control the distribution of block size, the average block diameter is reduced by 5 cm, the large block rate is obviously decreased, and the fractal dimension is increased; the time of gangue transportation and drilling&charging were reduced by 30 minutes and 60 minutes respectively; the monthly footage was increased by 22.2%, ensuring the tunneling efficiency of the hard rock roadway.