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In this study,we propose an approach of real‐time and fast retrieving the coseismic waves by GPS,strong‐motion combined measurements and broadcast ephemeris.Firstly,the velocity observation equations and state equations of the strong‐motion measurements are introduced into Precise Point Positioning (PPP) solution model,the baseline shifts of the strong‐motion are real‐time estimated as unknown parameters like other positioning parameters by a Kalman filter.Then,the true velocity wave was retrieved by correcting the estimated baseline shifts,the true displacement wave was recovered by the velocity integrated displacement after de‐trending a linear correction.The series of validation results have shown that,this method can fast and accurate retrieve the coseismic wave,the convergence time is smaller than one minute,and the precision are better than 2 mm/s and 2.5 cm for velocity and displacement respectively.