The experiments of a shell model under supercavitation are done by adoption of the header cable wire tow for the first time. The shell body of the experimental model is made by polycarbonate. Its cone body is made by aluminium alloy. Its header cavitation body is made by stainless steel. And its each several part is put together by screw thread or mucilage glue at last. The supercavitating test results of three different speeds indicate that it is feasible of carrying out the supercavitating test by adoption of the header cable wire tow. The trends of the strain curves situated at the same relative location on the shell body are coincident. The axial drag reduction effect is special obvious. The crest value of strain caused by tail impact vibration presented the recurrent characteristic. The strains that caused by axial loads and by tail impact vibration after supercavity formed are lying in the same level at the given speed. With the speed advancing the drag reduction effect of supercavity is much more visible. And the crest value of strain caused by tail impact vibration accordingly increased. The experimental results may provide the basis for the structural design of a supercavitating underwater vehicle.