The utility model provides a simple and easy elbow support that is geared to needs of job, a serial communication port, including activity channel -section steel and fixed channel -section steel, fixed channel -section steel top surface is the opening, and the bottom surface is equipped with the supporting part, and the activity channel -section steel hinges the top surface at fixed channel -section steel, and the one end of lead screw links to each other with the activity channel -section steel, and the other end is the operating portion. Utilize the utility model provides an elbow is gearedto the needs of the job, and the support carries out the pipeline and the elbow is geared to the needs of the job, accomplishes the prefabricated in advance of pipeline and corner joint, is convenientfor improve the efficiency of construction of piping erection. The utility model discloses simple manufacture, convenient to use, low in manufacturing cost has improved the aboral efficiency of construction of elbow, has practiced thrift construction cost.