Theoretical and experimental study on the speckle properties formed by propagating vortices beams probability through scattering medium is demonstrate d.Based on the theory and beam transmission theory,we simulate different top ological charges of speckle formed by vortex beams.The effects of scattering med ium particle size on the speckle characteristics are analyzed. The calculated results show that the speckle sizes formed by vortex beams throug h scattering medium are smaller than those of the Gaussian beam,and the speckle sizes will reduce with increasing topological charge of vortex beam or decreasing the particle size of the scatter ing medium.In experiment,the speckle is obtained by vortex beams propagating generated b y spiral phase plate through a scattering medium.The results show that the speckle contrast i ncreases with decrease of the particle size of the scattering turbid medium.Expe rimental results agree well with theoretical simulation.The results have very important potential applications to bio-medical imaging,and a lso material detection.