Xiao Yang, president of the Supreme People's Court, has been elected for a second term, while former public security minister Jia Chunwang will become the top prosecutor as head of the Supreme Procuratorate.
The selection of the two men is expected to give fresh impetus to the anti-corruption drive, which some observers say has lost momentum.
Mr Xiao is hailed for helping to curb corruption. Backed by Mr Jia, who is a veteran in public security, he is expected to revive the crackdown on graft.
Peter Wong Man-kwong, a Hong Kong deputy to the National People's Congress (NPC), said Mr Xiao's re-election, with 95 per cent of the votes cast, indicated that the delegates were satisfied with his performance.
Observers say the work reports of the Supreme People's Court and the Supreme People's Procuratorate will likely be approved tomorrow by a respectable margin of votes.
In the past, deputies have expressed their unhappiness over widespread graft and corruption by casting dissenting votes or abstaining.
In his progress report to the NPC last Tuesday, Mr Xiao said that over the past five years, the judicial system had been reforming its organisation and had redoubled efforts to prosecute corruption cases.