Abstract:The paper introduces the definition of ITRF2014, the global distribution of stations, the strategy of processing input data, and the improvements of ITRF2014 relative to ITRF2008.ITRF2014 first applies a non-tidal atmospheric loading model, then enhances the accuracy of the reference framework and optimizes the internal model. On the basis of conventional products, such as station coordinates, speed, residuals and EOPs, ITRF2014 has issued two new products: the geocentric motion model based only on SLR, and the post-seismic parametric model. The improvements on the original model have made advancements in updating and refining the regional coordinates and estimation of earthquakes.