Abstract: For continuous system simulation,it is necessary to add an imaginary artificialsampled-data-holder in this system.In this paper,a mathematical model which describes the relation between the simulation error in time-domain and the frequencyresponse of the holder is introduced.And the way to improve it is presented.A newhybrid compensator-holder has been built in accordence with the idea given above.Comparing with the triangular holder which has usually the highest simulation accuracy,it is possible to higher the simulation accuracy significantly by our newholder even in same computation step-size if the optimal compensator parameters aretaken.