Wave spectrum is the basis of coastal engineering design.The spectral properties of different sea areas and period waves are different.Therefore,it is necessary to analyze the wave spectrum for the measured sea waves.In this paper,the wave spectrum is analyzed based on Indonesia coastal wave data,therefore the relationship between spectral parameters and the statistical characteristic wave parameters are given.The measured wave spectrum is fitted according to the type of JONSWAP spectrum,and the formula of the wave spectrum applicable to the sea area is obtained,which can provide an important reference for engineering design.