With cyanuric chloride as the crosslinking monomer and 4,4′-diamino stilbene-2,2′-disulfonic acid (DSD acid) as raw materials, a new yellowing inhibitor for high-yield pulp was synthesized through joining the ultraviolet absorber 2,4-dihydroxy-benzophenone and triazine-stilbene fluorescent brighteners in the same molecule by the size of nucleophilicity method. The new product had the function of fluorescent whitening and absorbing ultraviolet. Its structure was demonstrated by FT-IR besides the physical properties were examined by UV-vis and photoluminescence(PL) spectra and the effect of anti-yellowing were evaluated – as the surface sizing agent on handsheet of chemimechanical pulps by using the ultraviolet aging apparatus. The results showed that the best dosage of the new yellowing inhibitor was 1.0% and could be proposed as a applicable yellowing inhibitior for lignin-content paper products, besides the brightness atbilities of chemimechanical pulp handsheets were increased more by application of the new yellowing inhibitor as surface sizing agent than those does by application of fluorescent brighteners and ultraviolet absorber alone respectively and declining brightness of hand-sheets treated by new yellowing inhibitor was 1.36%ISO and 4.25 %ISO less than hand-sheets treated by them after 48h UV accelerated irradiation..