Abstract: When the towed array undergoes distortion, the Direction of Arrival (DOA) will become worse, and the accurate estimation of the actual array position can improve the analysis of the DOA estimation effect. The array distortion of traditional ships is mainly manifested in the two-dimensional plane, while the array distortion of underwater three-dimensional motion platforms, such as gliders, is more complex. When the towing depth changes, the formation will produce inevitable distortion problems in the vertical dimension. The article for underwater three-dimensional movement platform with small drag array deformation research, mainly analyzes the underwater platform and floating drag array form in the vertical dimension of the attitude model, based on a small amount of the information attitude sensor matrix correction method, and use the simulation and data method performance validation and analysis, the results demonstrate the feasibility of this approach: after correction, the DOA estimation accuracy is notably improved.