High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material

The invention discloses a preparation method of a high-filling composite shielding material for radiation mixing fields. The preparation method comprises the following steps of: quantitatively weighing and uniformly mixing by taking hydrogen-rich thermoplastic resin as a base material, a boron-containing compound as a neutron absorber and metal lead as a gamma-ray absorber, and supplementing functional auxiliaries in a certain proportion; and performing processes such as sectional mould-pressing and sizing, sectional mould-pressing and molding, and the like under certain pressure and temperature field conditions. The preparation method is simple in preparation process and convenient to operate. The prepared high-filling composite shielding material for radiation mixing fields has a good outline state, no cracks, no shrinkage cavity and seam inside, uniform density, good material mechanical performances, and good shielding performances on neutrons and gamma-rays, is widely applied to neutron and gamma-ray ionization radiation protection and research field of places such as nuclear reactors, nuclear power plants, isotope radiation source devices, petroleum exploration well equipment, accelerators and isotope neutron sources.