The utility model relates to the technical field of valve actuator supporting devices, in particular to a detachable and adjustable valve actuator support which comprises a rooting clamp, an adjusting rod and a profiling tray. A connecting boss is fixed on the outer side of the rooting clamp, a threaded hole is formed in the middle of the connecting boss, an external thread matched with the threaded hole is arranged on the outer side of the lower portion of the adjusting rod, the external thread and the threaded hole are fixedly mounted together, and the profiling tray is fixedly mounted on the upper portion of the adjusting rod. The detachable and adjustable valve actuator support is reasonable and compact in structure and convenient to use, detach, install and carry, the position of the profiling tray can be adjusted by adjusting the direction of the rooting clamp and the expansion amount of the adjusting rod, the support can exactly support the lower side of an actuator and has fine adaptability, the rooting clamp, the adjusting rod and the profiling tray can be detached after use, the upper end face of the groove-shaped profiling tray is matched with the bottom of the actuator, the support has a fine lifting effect by the aid of the profiling tray, and supporting stability is enhanced.