Two new flavonoids, 8-formyl-3′,4′-dihydroxy-6,7-dimethoxyflavone ( 1) and 8-formyl-4′-hydroxy-3′,6,7- trimethoxyflavone ( 2), were isolated from the fruits of Ziziphus jujuba Mill. Their structures were elucidated on the basis of extensive NMR and MS means. The anti-tobacco mosaic virus (anti-TMV) and antioxidant activity of 1 and 2 were evaluated. They both showed anti-TMV activity with inhibition rates of 92.8% and 88.6%, and antioxidant activity with an IC value of 3.16 μg/mL and 3.87 μg/mL, respectively. [ABSTRACT FROM AUTHOR]