Poly(methyl methacrylate) (PMMA) has good transparency. Using PMMA as the raw material, plastic optical fiber panels were prepared by prefabricating polymer fiber rods, drawing them into fibers, and then hot-pressing them into panels. The results showed that as the holding time increased, the imaging performance of the plastic optical fiber panel first improved and then decreased. The optimal holding time was 6 h, which is 2 h longer than the theoretical holding time. Adjusting the prefabrication process of the polymer fiber rods to produce clean-surfaced multifilaments can reduce the impact of impurities on the boundaries of the multifilaments, lower the hot-pressing pressure, and decrease the pressing scale. This leads to the production of plastic optical fiber panels with clear and complete imaging. This method can reduce the production cost of fiber panels and result in a lighter product weight.