The invention provides a radio frequency ablation catheter with a reticulated pipe type support structure and a radio frequency ablation device. The radio frequency ablation catheter comprises the reticulated pipe type support arranged at the front end of the catheter. The reticulated pipe type support comprises reticulated pipes, one ends of all reticulated pipes are gathered to form a far end of the reticulated pipe type support, and the other ends of all reticulated pipes are gathered to form a near end of the reticulated pipe type support. The middle section of the reticulated pipe type support has a shrinking state and an expanding state, and one or more electrodes are fixed on the middle section of the reticulated pipe type support. The reticulated pipe type support in the radio frequency ablation catheter is good in flexibility, and can well cover blood vessels of different thicknesses and bent blood vessels. When the reticulated pipe type support expands in different blood vessels with the thicknesses being 4-12 mm, all the electrodes can be completely attached to the walls of the blood vessels. Meanwhile, when the reticulated pipe type support expands in a bent blood vessel, all the electrodes also can be attached to the wall of the blood vessel.