In order to accurately reflect the compression characteristics of the integral pierced carbon fiber felt, a compaction model for the pierced carbon fiber felt was constructed, employing finite element methods to predict the nonlinear mapping relationship between the compression load and compaction height. Initially, considering the randomness of the internal fiber distribution in the carbon fiber felt, a parametric modeling method for the microstructure of the carbon fiber felt was proposed, defining parameters such as fiber orientation, azimuth angle, and length. On the ABAQUS platform, a microscale geometric model of the carbon fiber felt was constructed using the Python programming language. Subsequently, the compaction process of the pierced carbon fiber felt was simulated using the Abaqus/Explicit algorithm, analyzing the structural changes of the preform at different stages of the compaction process. Finally, the relationship between the compaction height and the compression load of the preform was obtained through compaction experiments. The experimental results indicate that the structural morphology variations of the preform and the compression load–displacement curve relationship predicted by the numerical simulation are in good agreement with the experimental results, with the maximum error between the two being less than 5.5%, thereby validating the correctness of the compaction model of the pierced carbon fiber felt.