The invention discloses a digital-analog hybrid simulation method and system for operation characteristics of AC/DC hybrid power grids. The method comprises the following steps of: accessing a pre-established point-to-point half-wavelength power transmission line model into as pre-established AC/DC hybrid power grid digital-analog hybrid simulation model to construct an AC/DC hybrid power grid full-electromagnetic transient model; and simulating the AC/DC hybrid power grid full-electromagnetic transient model. According to the method and system, the system operation characteristics and AC/DC mutual influence characteristics are analyzed through simulating major faults of DC power grids on the basis of the established AC/DC hybrid power grid full-electromagnetic transient model.