The invention relates to a composite jarring tool, and belongs to the technical field of petroleum and natural gas exploitation drilling tools. The composite jarring tool comprises a hydraulic cylinder, a spline outer cylinder, a middle mandrel, an elastic clamping key, an upper joint and an upper mandrel, wherein one end of an upper outer cylinder is sequentially in threaded connection with a lower outer cylinder and a lower joint; the other end of the upper outer cylinder is sequentially in threaded connection with the hydraulic cylinder, the spline outer cylinder and the upper joint; a lower mandrel is slidably arranged in the upper outer cylinder, the hydraulic cylinder and the spline outer cylinder; one end of the lower mandrel is in threaded connection with a jarring block; the otherend of the lower mandrel is in threaded connection with the middle mandrel; the middle mandrel is in threaded connection with the middle mandrel; a locking sleeve is fixedly provided with a locking sleeve; two limiting half rings are movably arranged on the lower mandrel. The composite jarring tool is ingenious in design and is used conveniently, and solves the problems of single working mode andpoor risk resistance existing in the existing jarring tool; the tool meets the production and use requirements of enterprises.