In view of characteristics of seismic data of gobi sand dune areas, this paper, through various data processing means such as quality control, high pass filltering, dip angle filltering, field static correction, surface consistency deconvolution, precise velocity analysis, denoising before stack,multiple iterative operation of residual static correction, denoising after stack and modification after shift, has raised the data quality of seismic profiles in low signal to noise ratio areas and managed to form the seismic data processing technique for such complex areas as gobi, foreland and dune. Practical application of data from Qinghai and Xinjiang proves this data processing technique to be reliable and effective.