To measure the dynamic deformation of the object accurately,a phase analysis method based on Hilbert trans form is proposed.A sequence of speckle interfograms is recorded throughout the e ntire process of out-of-plane deformation.The 2D phase distribution of the dynamic speckle pattern is acquired by temporal Hilbert transform and spatial phase unwrapping.In time domain,each pixe l of the image sensor probes the surface as an independent unit and the deformation information coded with th e time-intensity modulation is obtained.After the bias intensity is removed,the wrapped phase difference betwee n the initial and current states is directly determined by using Hilbert transform and triangular transform.In spac e domain,a Fourier phase filter is employed to obtain a low noisy phase map.And the continuous phase distribution is acquired by the phase unwrapping algorithm based on discrete cosine transform (DCT).Finally,the experi ment is carried out to study the dynamic deformation of a rubber plate.High quality 3D phase distribution maps w ith different fringe densities are obtained,which can represent different deformation states.Under the experimental conditions,the maximum number of fringes resolvable in one frame is 26,which indicates the largest measurable deformation in the experiment is 6.92μm.The experimental results demonstrate that this method simplifies the al gorithm,thus suitable for the real time detection of the dynamic deformation.