The invention discloses a magnetic levitation train accurate positioning auxiliary device and method. Through effective control over ground communication loop line electromagnetic field distribution and in combination with a train-mounted loop line antenna, a magnetic levitation train is basically positioned, when the train operates at a low speed, the exact point of time of communication window border entrance of the train can be calculated through algorithm compensation and cooperation of a train-mounted signal system, so that the accurate position of the train traveling at the point of timeis reckoned, the automatic train operation (ATO) function of the magnetic levitation train is achieved, the train is accurately positioned and stopped in a platform region, and train door and platform door opening/closing is guaranteed. In addition, the device related to the scheme is simple, low in cost, accurate in detection and stable in performance.