In this study, we investigate the elastic properties of a composite consisting of platinum (Pt) and carbon nanotubes (CNTs) under the influence of an external impact using molecular dynamics simulations. The main focus of our research is on compression, and we compare the results with those obtained for a pure Pt crystal, as well as with the stretching of the composite. We employ the Modified Embedded Atom Method (MEAM) potential to describe the interaction between all particles, and we calculate mechanical stresses using the virial stress method. Our findings demonstrate that the Young's modulus of the composite is higher than that of pure platinum. Additionally, we analyze the effect of the strain rate on the elastic modulus and show that it decreases with an increase in the strain rate. Furthermore, we investigate the influence of the strain rate on the phase changes that occur in the composite. Overall, our study provides valuable insights into the elastic behavior of the Pt-CNT composite under compression and contributes to the understanding of the material's mechanical properties.