The invention discloses a neoprene-based nonmagnetic microwave absorbing patch material and a preparation method thereof. The neoprene-based nonmagnetic microwave absorbing patch material is prepared from neoprene, carbon nanotubes, a vulcanizing agent and an accelerant in the ratio of the neoprene to the carbon nanotubes to the vulcanizing agent to the accelerant being 100:(1-15):(4-15):(0.5-1.5). The preparation method of the neoprene-based nonmagnetic microwave absorbing patch material comprises the steps of preparing components, and green glue stock; loading the green glue stock in trigonal bags and pillow bags for 10-20 times, performing tight roll grinding for 10-20 times, adding the accelerant, then performing milling for 5-10 min once again, outputting patches, and performing vulcanizing and forming treatment on the milled patches. The neoprene-based nonmagnetic microwave absorbing patch material disclosed by the invention is simple and convenient to operate, effectively solves the problems that conventional wave patches are poor in performance, and also solves the problem that a magnetic adsorbent cannot have the advantages of being low in area density, powerful in absorption at a low-frequency position and the like.