In electronic speckle pattern interferometry experiment,object beam a nd reference beam are always plane light.We propose a new method for in-plan displacement measur ement by application of vortex beams in double-optical-path electronic speckle pattern interferomet ry.The method is based on the combination of traditional electronic speckle interferometry techni ques and liquid crystal spatial light modulators.The vortex beams are generated by liquid cryst al spatial light modulator,and the interference pattern of object beam and reference beam is cap tured by a CCD camera.We analyze two cases:vortex beam as reference light and plane beam as o bject light,where object light and reference light are both vortex beams.The interference intensity is ca lculated,and the interference fringe patterns are simulated before and after the object is de formed.The characteristics of fringe patterns are obtained.By four-step phase shifting me thod,the corresponding phase-maps are calculated.By unwrapping,we obtain the three-di mensional distribution of the in-plane displacement deformed phase.The simulation result s are compared and validated with those obtained using Fourier transform method in ele ctronic speckle pattern interferometry experiment system.The numerical simulation results suppor t that this paper provides a new method for in-plane displacement measurement.