The invention relates to a
rare earth coordination crosslinking rubber and a preparation method thereof. The invention is characterized by (1) uniformly mixing 1-100 parts by weight of
thermoplastic resin with polar functional groups, 100 parts by weight of rubber resin and 1-30 parts by weight of compatilizer for 5-25 min at the temperature of 30-260 DEG C in a mixing device of an open mill, an internal mixer or an extruder into a blending modified
sizing material; and (2) adding a
rare earth coordination crosslinking agent and a vulcanizing agent into the blending modified
sizing material, uniformly mixing, heating to 150-190 DEG C, quickly mixing for 210min, stopping mixing and standing still for 0.5-3min; and then rapidly heating up to 200-240 DEG C, continuing to mix for 9min-12min, stopping mixing and then obtaining the
rare earth coordination crosslinking rubber after standing still for 5-7min. With the method, the
thermoplastic coordination crosslinking rubber with the comprehensive
mechanical property equivalent to or superior to that of corresponding thermoset rubber can be prepared via optimized formula design, and the technical problem that the comprehensive mechanical properties of the non-covalent cross-linking rubbers are poorer is solved.