Bo, 64, erupted in anger after the judge in Jinan Intermediate People's Court yesterday sentenced him for corruption and abuse of power.
The former Politburo member yelled out "Unfair!" and "Unjust!" in an explosive ending to one of China's most politically charged trials in decades, Hong Kong-based South China Morning Post reported.
"The decision was not based on facts. The court is neither open nor just and didn't take the points made by my defence lawyers and me," Bo shouted before being forcibly taken away by the court's guards.
Xi, regarded as part of the pro-reform faction in the CPC, was elected by the Party Congress late last year as the new General Secretary for a 10-year period.
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The court found Bo guilty on three counts of bribery, embezzlement and abuse of power. Besides the life sentence, he was stripped of political rights and his assets were seized.
The court's microblog said only that Bo "was escorted out of the courtroom" after the verdict was announced.
State media, including CCTV, showed footage and pictures of Bo, the highest leader go on trial in recent years, in handcuffs with a hint of a smile as the verdict was read out.
Outside the court, the police presence appeared heavier than during the trial, underscoring the sensitivity of the event and to prevent protests by his supporters.
Bo's trial capped an 18-month political drama that some feared would cause a major rift in the Communist Party.
He is expected to appeal, which many believe will not alter the sentence but could be used by him to vent his anger and frustration.