Owing to their excellent light-absorption properties, ultrablack materials have broad application prospects in optical instruments, energy harvesting, and other fields. However, most methods for preparing them involve harsh conditions. More importantly, ultrablack materials exhibit inferior mechanical properties, which limits their application in light-absorbing layers. In this study, a porous template is prepared using laser processing technology, and robust polydimethylsiloxane / carbon nanotube (PDMS / CNT) ultrablack materials are obtained through transfer and peel-off. The structures, surface morphologies, and light absorption properties of the templateare characterized using scanning electron microscopy, Raman spectroscopy, and ultraviolet-visible-near infraredspectroscopy. The surface-temperature change under one-sun irradiation is recorded using an infrared thermal imaging camera to analyze its photothermal performance. The results show that, under laser ablation, a hole structure is formed on the template surface. The energy of laser irradiation vibrates the lattice of the carbon precursor, thus generating localized and instantaneous high temperatures. High temperatures can easily destroy the C-O, C=O, and N-C bonds in the resin, thus causing resin ablation and carbon formation in the holes. The size and depth of the holes can be altered by controlling the laser power. The hole size increases with laser power. As the laser power increases from 10 to 20 W, the hole size increases from 270 to 360 μm. Similarly, by increasing the laser output energy, the hole depth increases with the laser power. When the laser power is 20 W, the hole depth can reach 850 μm. Correspondingly, the PDMS / CNT light-absorbing materials exhibit an ordered, conical array structure of different sizes, and the surfaces of the conical structures are relatively rough. As the laser power increases, the depth-to-width ratio of the conical structure (aspect ratio) increases gradually from 1.6 (laser power = 10 W) to 2.1 (laser power = 15 W) and 2.8 (laser power = 20 W). A high aspect ratio facilitates multiple light reflections and creates light traps. The PDMS / CNT material prepared under 20 W laser power shows strong absorption in the wavelength range of 200-2 000 nm, light absorption exceeding 99%, and an extremely black surface. This is attributed to the intrinsic light-absorption characteristics of the CNT material; moreover, it is related to the conical array structure on the surface of the PDMS / CNT material, which can achieve anti-reflection and light trapping in a wide band through multiple light reflections and enhance light absorption. Thus, the reusability of the template is verified. After the template is reused five times, although the light-absorption performance of the obtained material degrades slightly, its light absorption remains higher than 99% in the wavelength range of 200-2 000 nm. The reusable template further simplifies the preparation process and reduces costs. Subsequently, the durability of the PDMS / CNT ultrablack material is investigated. The result shows that its light-absorption performance remains unchanged under high-temperature thermal aging and photoaging. Moreover, the ultrablack material is mechanically stable and can withstand repeated pressing. The conical surface array is primarily composed of a PDMS elastomer. Owing to its elasticity, the structure can recover after an external force is released. Moreover, after repeated pressing, no black substance is observed on the surface of the adhesive roller. This shows that the intrinsic light-absorbing CNTs are embedded in the PDMS and are stable. Compared with ultrablack materials such as carbon nanotubes and carbon aerogels, PDMS / CNT ultrablack materials are significantly more durable. Finally, the photothermal performance of the PDMS / CNT ultrablack material is investigated. Under one-sun irradiation, the surface temperature increases by 65 ℃ at the maximum. The method for preparing ultrablack materials is simple and offers good stability. Thus, ultrablack materials are highly promising for application in light absorption.