Composition for forming plastification material, shoe insole and preparation method of shoe insole

The invention relates to a composition for forming a plastification material, a shoe insole and a preparation method of the shoe insole. The composition for forming the plastification material comprises a polymer ingredient, wherein the polymer ingredient comprises an ethylene vinyl acetate copolymer, an ethylene-alpha-olefin copolymer with a surface hardness scope of 55-60 Shore A, an ethylene-alpha-olefin copolymer with a surface hardness scope of 85-90 Shore A and polypropylene; the surface hardness is determined according to an ASTM D2240 standard method; and a tan delta (-20 DEG C)/tan delta (40 DEG C) value scope of the plastification material formed by the composition is 2.5-3.8 at determination frequency of 10Hz according to a JIS K 7244-4 standard method. The plastification material formed by the composition can have high elasticity and low shrinkage at the same time. 种用于形成塑化材料的组成物、鞋中底与其制备方法。所述用于形成塑化材料的组成物包含聚合物组分，该聚合物组分包括乙烯醋酸乙烯酯共聚物、表面硬度范围为55～60萧耳A的乙烯-α-烯烃共聚物、表面硬度范围为85～90萧耳A的乙烯-α-烯烃共聚物及聚丙烯，其中，该表面硬度是依据