A basketball shooting training device (100, 200) comprising: a main frame (12, 202) for standing on a holding plane; a first vertical rail structure disposed on the main frame (12, 202), the first vertical rail structure having a vertical rail and an oblique rail, wherein the oblique rail is connected to a top end of the vertical rail; a first sliding base having a first base member and a first arm member, the first base member jacketing the first vertical rail structure and slidably contacting a first side of the first vertical rail structure for sliding along the first vertical rail structure, the first arm member extending from an outer edge of the first base member; and a first basketball imitation member connected to the first arm member, the first side of the first vertical rail structure facing the first basketball imitation member; wherein when the first basketball imitation member is propped and then propelled upwardly by a user's hand, the first base member slides from a first initial position on the vertical rail to a shooting position on the oblique rail and keeps contacting the vertical rail without pivoting relative to the vertical rail to make the first basketball imitation member move straightly and upwardly along the vertical rail and then move straightly and obliquely along the oblique rail when the first base member slides along the first vertical rail structure for guiding the user's hand to complete a set shot along the first vertical rail structure; and characterized by: the basketball shooting training device (100, 200) further comprising: at least one finger attaching device movably disposed on the first basketball imitation member, and either a linear guide rail being formed on the first basketball imitation member, the finger attachment device having a sliding block slidably disposed in the linear guide rail, or at least one arc-shaped guide rail being formed on the first basketball imitation member, and the finger attachment device being slidable along the arc-shaped guide rail. a main frame (12, 202) for standing on a holding plane; a first vertical rail structure disposed on the main frame (12, 202), the first vertical rail structure having a vertical rail and an oblique rail, wherein the oblique rail is connected to a top end of the vertical rail; a first sliding base having a first base member and a first arm member, the first base member jacketing the first vertical rail structure and slidably contacting a first side of the first vertical rail structure for sliding along the first vertical rail structure, the first arm member extending from an outer edge of the first base member; and a first basketball imitation member connected to the first arm member, the first side of the first vertical rail structure facing the first basketball imitation member; wherein when the first basketball imitation member is propped and then propelled upwardly by a user's hand, the first base member slides from a first initial position on the vertical rail to a shooting position on the oblique rail and keeps contacting the vertical rail without pivoting relative to the vertical rail to make the first basketball imitation member move straightly and upwardly along the vertical rail and then move straightly and obliquely along the oblique rail when the first base member slides along the first vertical rail structure for guiding the user's hand to complete a set shot along the first vertical rail structure; and characterized by: the basketball shooting training device (100, 200) further comprising: at least one finger attaching device movably disposed on the first basketball imitation member, and either a linear guide rail being formed on the first basketball imitation member, the finger attachment device having a sliding block slidably disposed in the linear guide rail, or at least one arc-shaped guide rail being formed on the first basketball imitation member, and the finger attachment device being slidable along the arc-shaped guide rail. at least one finger attaching device movably disposed on the first basketball imitation member, and either a linear guide rail being formed on the first basketball imitation member, the finger attachment device having a sliding block slidably disposed in the linear guide rail, or at least one arc-shaped guide rail being formed on the first basketball imitation member, and the finger attachment device being slidable along the arc-shaped guide rail.