This study reports the research investigation carried out to evaluate the ballistic performance of nonwoven felt of Ultra High Molecular Weight Polyethylene (UHMWPE) and its Shear Thickening Fluid (STF) impregnated sample. The Split-Hopkinson pressure bar (SHPB) setup was used to test the sample at a very high strain rate 102-105 s-1. Under this test, the sample is subjected to compressive loading under a high shear rate. The neat UHMWPE felt and STF impregnated felt was characterized by its thermal and morphological analysis by using SEM, DSC, TGA and XRD. From the SEM micrograph of impregnated felt, it is observed that there is a proper impregnation of STF inside the voids of the felt and also the adhesion of silica particles on the surface of the UHMWPE fibers. STF properties were also analyzed by rheological testing, which includes rotational, oscillatory and thixotropy tests. The thixotropy test result reveals the structural regeneration of STF after its decomposition at a high shear rate. The results obtained from SHPB test showed that the peak stress is the same in both neat and STF treated samples which indicate that the bulk properties of the UHMWPE felt was not affected by the impregnation of STF into it. However, the impact toughness of impregnated felt increases with increasing loading capacity of strain rate. These results confirm that STF impregnated felt shows better performance in the ballistic test as compared to neat felt.