In view of the local wave shape problem of the rolling of cold continuous rolling mill, uneven distribution of emulsion along the width of strip steel, or uneven heating of the roll caused by the blockage of nozzle, the influence mechanism of the horizontal distribution of emulsion on the temperature field and hot roll shape of the working roll is analyzed. The influence mechanism of emulsion transverse distribution on strip shape is also analyzed. The strip shape distribution before and after emulsion adjustment is simulated. On this basis, the automatic prediction model of emulsion point cooling is established to ensure that the strip shape rolled by tandem cold mill does not have obvious shape defects and that the emulsion cooling capacity of each nozzle is uniform. This work provides technical guidance for the control of local wave shape on site. The local wave shape of finished strip can be significantly reduced after applied to the site.