Alleged Australian child sex predator Peter Scully will escape the death penalty if convicted despite what police say were the most shocking cases of child murder, torture and abuse they have ever seen in the Philippines.

Lawmakers have excluded Scully's alleged crimes from a death penalty bill that has passed in the country's parliament 216 votes to 54.

The bill reintroduces the death penalty which was abolished in 2006 but only for eight heinous drug-related offences.

Prominent politicians in Manila and prosecutors had argued for the bill to cover offences Scully faces, including directing "dark web" videos that showed horrific acts to children and babies.