The invention relates to the field of new energy automobile power charging technology, and in particular to a power charging station, a vehicle positioning method, a device and a system, in order to solve the technical problem of precise positioning of vehicles. To this end, the method comprises the following steps: step S101: the position adjustment information of the vehicle is obtained; step S102: the vehicle position is adjusted; step S103: whether the variance between the post-adjustment positioning information and preset standard positioning information of the vehicle is less than the preset threshold or not is determined: if true, the positioning is ceased, and if false, step S101 is repeated. Based on the above-mentioned steps, the closed-loop control of the vehicle positioning canbe carried out to realize accurate positioning. The above-mentioned method can be materialized by utilizing the device, the system and the power changing station.