The invention discloses a virtual-interaction method. The method is applied between an active body and a passive body, and includes: respectively modeling the active body and the passive body to obtain a first model of the active body and a second model of the passive body, wherein the first model includes a line segment main-body model and a ball cap model connected with each other, and the second model includes a curved-surface model; determining an interaction state between the first model and the second model, wherein the interaction state is determined by a distance between the first model and the second model, and interaction states include a proximity state, a contact state and a squeeze state; and calculating a change of the first model or calculating a change of the second model according to the interaction state. The technical solution provided by the invention can improve the precision of human-machine interaction.