A special real mixed entanglement of triqubit pure states is proposed. Different from Greenberger-Horne-Zeilinger (GHZ) entanglement and W entanglement, it has the properties of GHZ entanglement and W entanglement at the same time. The mixed entangled states are constructed using two inequivalent sets composed of four non-superfluous basis vectors. A new measurement method, the total tangle, is introduced for quantifying total entanglement (including mixed entanglement) of the triqubit pure states. It is revealed that there is mixed entanglement in the final state in the experiment reported by Walther et. al., and the proportion of W entanglement is larger than that of GHz entanglement.