The invention discloses a wide-band liquid crystal laser protection material prepared by multi-point click chemistry and a preparation method thereof, 2, 6-dihydroxy anthraquinone is used as a basis, and esterification reaction, sulfydryl click reaction, [2 + 2] cycloaddition-cyclic splitting click reaction and azido alkyne 1, 2-dihydroxy anthraquinone are carried out to prepare the wide-band liquid crystal laser protection material. The liquid crystal laser protection material capable of absorbing broadband spectrums is prepared through a 1, 3 dipole cycloaddition click reaction and the like, the preparation method is simple, convenient and efficient, the product yield is high, purification is easy, no by-product is generated, and the preparation method is an ideal preparation mode; the prepared anthraquinone derivative is excellent in property, wide in absorption wave band and high in absorption capacity, the maximum absorption wavelength can be changed due to changes of groups and side groups, the absorption wavelength range is expanded, and the anthraquinone derivative has liquid crystal properties, is more flexible in application and has great application value.