Official figures show that more than 175 immigrant offenders were able to escape attempts to kick them out of the country because they had married or had children here.
In total one in five of all foreign national criminals had their appeal against deportation accepted.
Ministers are trying to make the system tougher but there are fears that judges will simply ignore the new rules unless they are enshrined in law.
Charlie Elphicke, the Conservative MP for Dover & Deal who obtained the latest statistics, said: "It's shameful that child killers and rapists can abuse human rights laws to escape deportation.
"What about the right to family life of the families they have destroyed?"
Any foreign nationals who receive jail sentences longer than 12 months are meant to be automatically removed from Britain when they are released from prison.
But they are able to use Article 8 of the European Convention on Human Rights, which guarantees the right to a family and private life, to appeal against the Home Office's bid to deport them.
Updated figures disclosed in a parliamentary written answer show that of the 409 overseas offenders who won legal appeals to remain in the country in 2011-12, a total of 177 (43 per cent) did so on Article 8 grounds.
However ministers insist the figures will fall now because of new immigration rules, which came into force in July, that mean family life will only outweigh criminality in "exceptional circumstances".
The newly appointed Immigration Minister, Mark Harper, said: "It is completely unacceptable that foreign nationals whose criminal behaviour undermines our way of life have been able to use weak human rights claims to dodge deportation.
"That is why we introduced new rules in July to make it clear when the rights of the law-abiding majority should outweigh a foreign criminal's right to family and private life."