A binocular stereo vision device, adjusting method and apparatus thereof and a display device are provided. The binocular stereo vision device includes: an acquisition system including two acquisition units (1) arranged at intervals and being configured to acquire a depth distance from a measured object to the acquisition system; an adjustment mechanism (3) configured to adjust a distance between the two acquisition units (1); a sensor (2) configured to acquire an initial distance between the two acquisition units (1); and a processing unit (4) configured to obtain a standard distance between the two acquisition units (1) according to the acquired depth distance from the measured object to the acquisition system and output a control signal according to a difference between the standard distance and the initial distance, wherein the adjustment mechanism (3) adjusts the distance between the two acquisition units (1) to be equal to the standard distance according to the control signal outputted by the processing unit (4). The binocular stereo vision device, adjusting method and apparatus thereof and the display device can improve the recognition range and the recognition accuracy of the binocular stereo vision device.