A rare earth isoprene rubber catalyst process method comprises the steps: under the protection of nitrogen, adding isoprene and hexane into a reaction kettle according to a certain mass ratio, preheating, and then adding a certain amount of a catalyst A and a certain amount of a catalyst B, wherein the amount of the catalyst A is calculated according to Nd, the molar ratio of Nd to the isoprene monomer is 3.0*10<-5>-5.0*10<-3>, and the molar ratio of the catalyst A to the catalyst B is 1 to (10-30); and after mixing, adding a certain amount of a catalyst C, triggering a polymerization reaction with the molar ratio of the catalyst A to the catalyst C of 1 to (1-5), at the temperature of 40 DEG C-70 DEG C and at the pressure of 0 MPa-0.4 MPa, continuing to carry out a reaction for 3-5 hours, and carrying out condensation to obtain the product rare earth isoprene rubber. The catalyst A is a rare earth neodymium organic compound; the catalyst B is alkyl aluminum; the catalyst C is a chloride.