A two-stage folding structurer for two-fold inverted umbrella includes an umbrella shaft assembly consisting of an inner shaft tube, an outer shaft tube and a handle, and a control device set including a release mechanism mounted in the outer shaft tube, a positioning device mounted in the inner shaft tube, a spring member connected between the release mechanism and the positioning device and a control device mounted to the handle. When the outer shaft tube is received to the inner shaft tube in the received position, the release mechanism is moved close to the positioning device, and a hook of the positioning device is forced to hook in a retaining notch of the release mechanism to lock the outer shaft tube and the inner shaft tube in the received position.