The invention relates to a technique for recycling rare earth from rare earth mining wastewater by a resin adsorption method, which comprises the following steps: collecting wastewater, pretreating resin, carrying out column packing of resin, and adsorbing rare earth ions; monitoring, desorbing resin, and settling rare earth in the adsorption process; and adding ammonium bicarbonate to deposit the rare earth, wherein the mass ratio of rare earth to ammonium bicarbonate is 1:3. The technique for recycling rare earth from rare earth mining wastewater by resin adsorption method of the invention has the advantages of low production cost and simple technique, and can adsorb more than 20 Kg of rare earth everyday by using 1 ton of resin. The invention can recycle rare earth and purify water in remnant mine regions after mining rare earth.