The invention provides a portable paraboloid satellite earth antenna capable of being rapidly erected and folded, which mainly comprises an antenna reflection panel, a supporting and adjusting mechanism of the antenna reflection panel, a feed source tuner assembling unit and a supporting and adjusting mechanism of the feed source tuner assembling unit. The antenna is characterized in that the supporting and adjusting mechanism of the antenna reflection panel comprises a chassis, a first support, a second support, a facing bar, a third support, a locating support, an elevation regulating stem lower part, an elevation regulating stem upper part and a first dished lock-screw, wherein the first support and the second support are fixedly connected with the chassis; the facing bar is fixedly connected with the antenna refection panel, the third support is fixedly connected with the facing bar, one end of the locating support is fixedly connected with the facing bar and the other end of the locating support is flexibly connected with the first support; and the elevation regulating stem lower part is flexibly connected with the second support, one end of the elevation regulating stem upper part is flexibly connected with the third support, the other end of the elevation regulating stem upper part is flexibly sheathed with the elevation regulating stem lower part, and the first dished lock-screw is connected with the elevation regulating stem upper part. The invention is especially suitable for temporary sites and outdoor sites and has the advantages of compact structure, rapid andflexible erection and folding, convenient carrying and strong practical applicability.