The invention provides a mobile terminal iris recognition device with a human-computer interaction mechanism. The device comprises a human-computer interaction module, a multi-spectral iris image optical gathering module, an iris image analysis and processing module, a feedback control module and a power supply module, wherein the human-computer interaction module is used for ensuring that a user configures the mobile terminal iris recognition device in the process of iris image gathering and processing and being combined with the device to realize a human-computer interaction function; the multi-spectral iris image optical gathering module is used for gathering an iris image of the user; the feedback control module is used for feeding back processed results of the iris image analysis and processing module to the multi-spectral iris image optical gathering module, accordingly adjusting imaging parameters of the multi-spectral iris image optical gathering module, and feeding back processed results from the iris image analysis and processing module to the feedback control module of the human-computer interaction module. Accordingly to the mobile terminal iris recognition device with the human-computer interaction mechanism and a method, miniaturization, mobility, usability and the like of the iris recognition device can be improved.