The present invention discloses a pre-cleaning process before a texturing process. The process comprises the steps that (1) an automatic feeding
machine transmits
silicon slices to five rails separately; (2) the
silicon slices enter a pre-cleaning water tank for cleaning according to the set speeds under the driving of rollers; (3) after cleaning, the residual water on the
silicon slices is extruded by a soft roller at the
tail end of the water tank; (4) the silicon slices are fed to an
air knife groove, so that the silicon slices of which the surfaces are wet are dried under N2
atmosphere; (5) the silicon slices having hidden
cracking severely in the step (4) are blown to crack, and the small broken silicon slices drop into an
air knife groove body, and the large broken silicon slices enter a next slice
pickup groove under the driving of the rollers; (6) cleaning and picking out the broken silicon slices in the step (5), and feeding the pre-cleaned silicon slices to the
etching groove to carry out the cleaning and texturing. The silicon slices of the present invention is washed in the pre-cleaning water tank, then are dried in the
air knife groove, so that the surfaces of the silicon slices entering the
etching groove are guaranteed to be dry and clean, and the water is prevented from being brought to the
etching groove to reduce the concentration of the
medicine liquid in the etching groove.