Abstract: Disclosed is an inclination-adjustable golf training device capable of optionally changing the inclination of its platform, on which a player stands to practice his golf swing, in order to simulate the condition of a real golf course, thereby obtaining an enhanced training effect. The golf training device includes an upper plate assembly, to which a ball supply unit and a controller are internally mounted, the upper plate assembly including an upper plate, on which a player stands to practice his golf swing, a lower plate assembly adapted to support the upper plate while being spaced apart from the upper plate, a vertical reciprocating unit mounted on the lower plate assembly while including driving and driven parts operating to adjust the inclination of the upper plate with respect to the lower plate assembly in all radial directions.