The base shock signal should be evaluated for the naval ship components shock design. The standard shock response spectrum does not contain the complex dynamic characteristics of ship shock. While the shock data recorded in a ship shock test can’t be a standard.A naval underwater explosion shock signal curve fit method is developed for naval equipment anti-shock simulation and evaluation. Fourier transform is adopted to correct the measured signal curve fit with the standard design shock response spec-trum. The corrected shock signal keeps both the real shock property and the quantity of the standard design shock response spectrum. It represent naval vessel shock environment on specification position in real un-derwater explosion shock scene.