Abstract: Space very long baseline interferometry(SVLBI) is the unique space technology that can directly interconnect the three reference systems,which include the conventional inertial system (CIS) fixed in space and defined by radio sources,the conventional terrestrial system (CTS) fixed to the Earth and defined by a series of observing stations on the ground,and the dynamic reference system defined by the movement of a satellite.An SVLBI mathematical model with nutation parameters is discussed,and its feasibility for estimation of EOPs is discussed.Simulations have been done for the SVLBI observations and related parameters for the RADIOASTRON.With the results of simulation,the sensitivity of EOPs to the priori errors of the associated parameters which include the coordinates of the ground VLBI stations,the orbit parameters of RADIOASTRON satellite,clock parameters and the coordinates of radio source is studied.