The invention relates to the technical field of profile preparation, in particular to a device for preparing flow lines on the surface of wood-plastic composite materials, including an intelligent control system, a main material feeding mechanism, a main material melting and plasticizing mechanism, a color masterbatch mixing mechanism, a color masterbatch Material melting and plasticizing mechanism, main material homogenizing mechanism, color masterbatch homogenizing mechanism, cooling mechanism, texture control mechanism, main material unloading mechanism is connected with main material melting and plasticizing mechanism, main material melting and plasticizing mechanism is connected with main material homogenizing Mechanism, the color masterbatch mixing mechanism is connected to the color masterbatch melting and plasticizing mechanism, the color masterbatch melting and plasticizing mechanism is connected to the color masterbatch homogenizing mechanism, and the output end of the main material homogenizing mechanism is connected to the color masterbatch homogenizing mechanism and the cooling mechanism in turn , Texture control mechanism. Compared with the film sticking process on the market, the product prepared by the integrated molding technology of the present invention does not fade, peel or crack, and is more environmentally friendly and full of vitality.