Abstract: In order to solve the problem of weak interlaminar shear resistance of T-shaped laminate composites, the weaving process of composite preform was reasonably designed, and the T-shaped fabric was woven by SGA598 small sample loom. The T-shaped fabric was prepared by vacuum assisted resin transfer molding (VARTM) process, and its impact resistance under low velocity impact was studied. The geometric and material models were established by using the finite element software ABAQUS to simulate the impact response process under different impact energies. The results show that the T-shaped stiffened plate has high impact resistance, and the simulation results are in good agreement with the experimental results. The finite element model has good reliability.