A new method called elimination by preferential probability(EPP)to remove discrete phase outliers in Delaunay tessellation-particle tracking velocimetry(DT-PTV)was proposed. In the present method

the modules to eliminate redundant matches and the inverse calculation to enlarge matching information were adopted and a multiple-way in outliers elimination used in discrete phase flow field was developed on the basis of the double-layer matching pattern in DT-PTV and the combination modes of modules and inverse calculation. From the application in self-defined flow fields and comparison of accuracy rate

matching information maximizing in DT triangle level followed by most-suitable-matches selection in particle level is an optimum way of outlier elimination in discrete phase with an accuracy rate of about 92% in a low spatial rate(187.215). In addition

the DT-PTV combined with EPP was used for velocity measurement of sand phase in saltation layer of wind-sand flow

and the results of single-grain paths abstracted can meet the requirement.