The invention relates to the technical field of compression molding devices, in particular to a compression molding device for a colorful bottle cap. The compression molding device for the colorful bottle cap comprises a machine base and is characterized in that the machine base is provided with a rotary extruding device, a feeding device, a rotary scraping device and at least two extrusion screw mechanisms; the at least two extrusion screw mechanisms are used for extruding molten plastics in different colors into the feeding device to be converged, and the rotary scraping device is used for scraping off the molten plastics of the feeding device and sending the scraped molten plastics into the rotary extruding device to be subjected to extrusion forming; a discharging mechanism used for discharging a formed product is further arranged on the machine base. The compression molding device for the colorful bottle cap has the following advantages that firstly, an existing colorful cap production process is greatly simplified; secondly, manual intervention is not needed in the whole production process of the device, the automation level is high, the production efficiency is obviously improved, and thus labor cost is reduced; thirdly, forming is easier, and the yield of products is high; and fourthly, personalized expression is provided for the products, and different requirements of different products are met.