Effect of single pulse intervals (SPI) processing on the laser micro texture is discussed. An investigation on the 45 steel samples is performed by using a nanosecond frequency doubling Nd3+∶YAG laser. The influencing laws of laser parameters (the laser fluence, number of pulses) and the geometrical parameters of micro-crater as well as surface plasma absorption rate of laser are investigated. Compared with continuous pulses processing, the advantage of SPI are analyzed from experiment and temperature field simulation. The results show that with the increase of the laser fluence, the micro-crater diameter increase with a logarithmic function, while the micro-crater depth increases, then level off, finally fall slightly down. Effect of pulse number on micro-crater diameter is not significant, but the micro- crater depth increases linearly. Compared with continuous pulses processing, SPI minimizes the heat effect which is negative, and the effect of multiple pulse on micro texture internal morphology has a "smooth" role; when ensuring the material removal rate of a single pulse, the efficiency of the laser processing high quality micro texture is improved.