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We present the observations of a blowout jet that experienced two distinctejection stages. The first stage started from the emergence of a small positivemagnetic polarity, which cancelled with the nearby negative magnetic field andcaused the rising of a mini-filament and its confining loops. This furtherresulted in a small jet due to the magnetic reconnection between the risingconfining loops and the overlying open field. The second ejection stage wasmainly due to the successive removal of the confining field by thereconnection. Thus that the filament erupted and the erupting cool filamentmaterial directly combined with the hot jet originated form the reconnectionregion and therefore formed the cool and hot components of the blowout jet.During the two ejection stages, cool H{\alpha} jets are also observed cospatialwith their coronal counterparts, but their appearance times are earlier thanthe hot coronal jets a few minutes. Therefore, the hot coronal jets arepossibly caused by the heating of the cool H{\alpha} jets, or the rising of thereconnection height from chromosphere to the corona. The scenario that magneticreconnection occurred between the confining loops and the overlying open loopsare supported by many observational facts, including the bright patches on theboth sides of the mini-filament, hot plasma blobs along the jet body, andperiodic metric radio type III bursts at the very beginnings of the two stages.The evolution and characteristics of these features manifest the detailednon-linear process in the magnetic reconnection.

On a solar blowout jet: driven mechanism and the formation of cool and hot components