The invention discloses a cold-rolled galvanized product surface topography control method. Through controlling a surface roughness degree and a peak value of a working roller of a finisher, the control on a surface roughness degree and a peak value of a steel plate is realized, and the surface roughness degree of the working roller is controlled to be in the range from 1.5 to 3.0mum. According tothe cold-rolled galvanized product surface topography control method provided by the invention, the roller surface of the working roller is in a convex ball shape after being roughened, so that in the rolling process, a roller convex shape presses into band steel so as to easily produce a concave pit on the surface of the strip steel and forms a sealed oil groove, the formability and the coatingperformance of a plate strip are improved, and the product consistency of cold-rolled galvanized plates is improved.