The invention relates to a
radiofrequency ablation device for tumors. The
radiofrequency ablation device comprises a needle tube, a needle tip, a fixed
handle, an
electrode needle, an
electrode pushing rod and a rotary rod, wherein the inner left part of the needle tube is fixedly provided with a cylindrical guiding part, the middle of the cylindrical guiding part is provided with a first channel along the axial direction, a plurality of second channels are arranged along the axial circumferential direction, and the left end of each second channel is outwards bent; the needle tip is of a cone shape, is fixedly arranged on the left end of the needle tube and is provided with a fourth channel and a fifth channel, wherein the fourth channel and the fifth channel independently correspond to the first channel and the second channel, a master
electrode needle penetrates out of the tip end of the needle tip in a straight line way, and slave electrode needles penetrate out of the side surface of the needle tip to carry out outward divergent distribution; the fixed
handle is integrally of a cylinder shape, and the left end of the fixed
handle is fixedly connected with the needle tube; the electrode needle comprises the master electrode needle and the slave electrode needles, wherein the right end of the master electrode needle and the right ends of the slave electrode needles are fixedly connected with an electrode needle seat, the master electrode needle is a tube-shaped needle, and the electrode needle is electrically connected with an electrical plug; the left end of the electrode pushing rod is fixedly connected with the electrode needle seat; and the left end of the rotary rod is rotatably hinged to the right end of the electrode pushing rod.