The invention discloses a map vehicle icon drawing method and system and a navigation terminal. The method comprises the steps that a vehicle icon is drawn by converting longitude and latitude information of a first map into first screen coordinate information on the basis of screen coordinate information corresponding to the first screen coordinate information at the position of the vehicle; then, after map conversion is performed, longitude and latitude information of the second map and the longitude and latitude information of the first map are matched and worked out, second screen coordinate information corresponding to the longitudinal and latitude information of the second map is obtained, the screen coordinate position corresponding to the offset vehicle position is worked out through the offset amount and the screen coordinate position of the vehicle icon is updated, so that during map conversion, the vehicle icon does not need to be drawn again, the vehicle icon of the map which is not converted just needs to be subjected to the translation operation, and then the vehicle icon of the converted map is obtained; the map switching time is greatly shortened, and user experience is improved.