The utility model relates to an electric push rod type defilading net supporting device comprising a mobile base, a shears type retractable support, a push rod control device, a push shaft and two guide grooved rails. The guide grooved rails are arranged on the mobile base in parallel, the push shaft is arranged between the guide grooved rails and capable of moving along guide grooves of the guide grooved rails, the top of the shears type retractable support is provided with an arc top cap, a retractable rod on one side of the bottom of the shears type retractable support is hinged to the mobile base, a retractable rod on the other side of the bottom of the shears type retractable support is penetratingly arranged on the push shaft, the push rod control device comprises a power supply, a control switch and a self-locking electric cylinder, the self-locking electric cylinder is fixedly arranged on the mobile base, and a push rod of the self-locking electric cylinder is fixedly connected with the push shaft. An electric motor is utilized to drive connecting rods to move so as to enable the shears type retractable support to quickly uplift a net with the surrounding fixed, and the landform is changed.