The antishock ability of naval ship equipment is very important for ship vitality. For the reasons of cost and safety, the real test measurement cannot be processed frequently. The technology of numerical simulation provides a new method for ship equipment evaluation. The finite element analysis technology based on acousticstructure interaction method was used to simulate the shock response of a small floating shock platform(FSP) numerically. Then, the realtime explosion test validated the peak acceleration and shock response spectrum compared to the simulated result. The results showed that numerical simulation can provide the exact input for ship equipments and predict the shock environment of the FSP accurately. The method can be extended to medium and large FSP.