A new model of doublet Accommodating Intraocular Lens (AIOL) is proposed by using a reasonable simulation method which is more applicable for the practical case of human eyes. The induced accommodation of the singlet AIOL and doublet AIOL including the combination of two positive lenses, positive-negative lenses and negative-positive lenses are compared with nearly the same vision performance for the eyes implanted with these AIOLs. These results show that the induced accommodation of doublet AIOL constituted by two positive lenses or an anterior negative lens and a posterior positive lens is lower than that of the singlet AIOL, the induced accommodation of doublet AIOL comprising an anterior positive lens and a posterior negative lens is obviously higher than that of the singlet AIOL, and the accommodation amount increases with the power of anterior lens. When the spherical aberration Z40 varies from 0.096 to 0.263, the tuning range of the effective accommodation is only 0.03D. The above results may be helpful for understanding the current designs and developing doublet AIOL.