A method for identity authentication in a virtual reality environment, the method comprising: receiving, by a head-mounted virtual reality terminal device worn by a user, a user identity authentication request; outputting, by the terminal device, a prompt interface in a virtual reality environment, wherein the prompt interface is used to notify the user to complete collection of an eye physiological feature, wherein the prompt interface displays prompt information and a virtual eye model displayed as a 2D or 3D drawing of an eye, to the user, and wherein the prompt information includes a collection time when the eye physiological feature will be collected; collecting, by the terminal device, eye images of the user; creating the virtual eye model by a modeling tool carried in the terminal device, the terminal device extracting feature points from the eye images of the user and then inputting the extracted feature points into the modeling tool to create the virtual eye model, whereby each eye feature point in the virtual eye model is mapped to a corresponding feature point of the user's eye; performing, by the terminal device, motion tracking on the extracted eye feature points, to collect coordinate data of each eye feature point in real time, and to record a coordinate data change of each eye feature point to obtain coordinate change data of each eye feature point; searching, by the terminal device, the virtual eye model for the mapping feature points that correspond to extracted eye feature points, and then synchronously adjusting the positions of the identified mapping feature points based on the collected coordinate change data, to ensure that an eye action of the user simulated by the virtual eye model is completely consistent with an eye action actually generated by the user, thereby directly performing liveness detection by the terminal device based on the virtual eye model of the user; collecting the eye physiological feature of the user from the eye images of the user by using eye recognition hardware built into the virtual reality terminal device, the eye recognition hardware comprising an RGB camera with an LED light source for performing light compensation for the RGB camera and an infrared camera with an infrared LED light source for performing light compensation for the infrared camera, wherein the eye physiological feature comprises an eye print feature and an iris feature, the RGB camera collecting the eye print feature and the infrared camera collecting the iris feature, and wherein the RGB camera and the infrared camera are installed at respective positions of the VR terminal device that correspond to the user's eyes; and performing an identity authentication on the user based on the eye physiological feature. receiving, by a head-mounted virtual reality terminal device worn by a user, a user identity authentication request; outputting, by the terminal device, a prompt interface in a virtual reality environment, wherein the prompt interface is used to notify the user to complete collection of an eye physiological feature, wherein the prompt interface displays prompt information and a virtual eye model displayed as a 2D or 3D drawing of an eye, to the user, and wherein the prompt information includes a collection time when the eye physiological feature will be collected; collecting, by the terminal device, eye images of the user; creating the virtual eye model by a modeling tool carried in the terminal device, the terminal device extracting feature points from the eye images of the user and then inputting the extracted feature points into the modeling tool to create the virtual eye model, whereby each eye feature point in the virtual eye model is mapped to a corresponding feature point of the user's eye; performing, by the terminal device, motion tracking on the extracted eye feature points, to collect coordinate data of each eye feature point in real time, and to record a coordinate data change of each eye feature point to obtain coordinate change data of each eye feature point; searching, by the terminal device, the virtual eye model for the mapping feature points that correspond to extracted eye feature points, and then synchronously adjusting the positions of the identified mapping feature points based on the collected coordinate change data, to ensure that an eye action of the user simulated by the virtual eye model is completely consistent with an eye action actually generated by the user, thereby directly performing liveness detection by the terminal device based on the virtual eye model of the user; collecting the eye physiological feature of the user from the eye images of the user by using eye recognition hardware built into the virtual reality terminal device, the eye recognition hardware comprising an RGB camera with an LED light source for performing light compensation for the RGB camera and an infrared camera with an infrared LED light source for performing light compensation for the infrared camera, wherein the eye physiological feature comprises an eye print feature and an iris feature, the RGB camera collecting the eye print feature and the infrared camera collecting the iris feature, and wherein the RGB camera and the infrared camera are installed at respective positions of the VR terminal device that correspond to the user's eyes; and performing an identity authentication on the user based on the eye physiological feature.