The invention discloses a high-intensity supporting device for tea leaf planting. The device comprises an auxiliary supporting frame, a positioning groove, a positioning hole, a fixing lantern ring, amain supporting rod, a fixing hole and a protrusion; a supporting plate is installed on the top of the main supporting rod, a threaded groove is formed in the top of the supporting plate, and the threaded groove is rotationally connected with a threaded rod through a thread formed inside the threaded groove; a fixing rod is fixedly connected to the top of the threaded rod, the top of the fixing rod is rotationally connected with the bottom of the auxiliary supporting frame through a rotating shaft, vertical positioning grooves are formed in the front face and the back face of the main supporting rod, positioning holes are formed inside the positioning grooves, the positioning holes run through the main supporting rod, the fixing lantern ring is movably connected to the middle of the mainsupporting rod, and the interior of the fixing lantern ring is movably connected with the positioning grooves in the main supporting rod through the protrusion. By arranging the auxiliary supporting frame on the top of the device, main branches of tea trees can be supported and protected, and the tea tree protective effect is improved.