The invention discloses an adjustable-included angle support plate-type combustion stabilization device for a scramjet engine. The adjustable-included angle support plate-type combustion stabilizationdevice comprises two combustion stabilization support plates (1), connection hinges (2), adjustment support plates (3), two strong magnets (4), an oval wheel (5) and a stepping motor (6), wherein oneside of each combustion stabilization support plate (1) is connected by the connection hinges (2), an included angle between the two combustion stabilization support plates (1) is an acute angle, twoadjustment support plates (3) are respectively connected with the other sides of the two combustion stabilization support plates (2) by the hinges (2), the two strong magnets (4) are respectively andclosely assembled with the other sides of the adjustment support plates (3), the oval wheel (5) is closely matched with the two strong magnets (4) by attraction forces of the strong magnets (4), andthe stepping motor (6) is placed at a middle part of a cavity formed by connection of the two combustion stabilization support plates (1) and is connected with the oval wheel (5). By the adjustable-included angle support plate-type combustion stabilization device, the problem that the included angle between the support plates during the working process of existing scramjet engine with stable support plates cannot be adjusted is solved.