Particulate emissions of engine fuelled different proportions of biodiesel-diesel blends were collected under different fuel supplying advanced angles and different operating conditions. The change of volatile organic fractions in particulate emissions was analyzed using thermo-gravimetric analytical instrument when temperature increased. The results showed that under the tested conditions, compared to the proportions of biodiesel-diesel blends, the change of fuel supplying advanced angle had little influence on the amount of volatile organic fraction in the particulate emissions. The volatile organic fraction in the particulate emissions increased with the increase of the proportions of biodiesel in the blends; volatile organic fractions peaked at the evaporation temperature of 150~180℃, and with the percentage of biodiesel increased, the volatile organic fractions were more concentrated in the temperature range with the increase of percentage of biodiesel.