The former teacher has reportedly been found stabbed to death in his prison cell at HMP Full Sutton in East Yorkshire.
His body was found on Sunday and it is believed he was attacked with a shank.
The 33-year-old, from Ashford, Kent, was jailed after confessing to 71 charges of vile sex abuse against children.
Huckle’s campaign of terror against children, some as young as six months old, lasted for nine years and he had been ordered to spend at least 25 years behind bars.
When he was jailed, a member of the public shouted “a thousand deaths is too good for you”.
He was only 28 when he was locked up for his “campaign of rape” and was being held in a prison containing some of the country’s most dangerous men.
Huckle pleaded guilty to an unprecedented 71 charges, but police believe he may have been responsible for many more offences.
He boasted about how easy it was to abuse children from impoverished backgrounds and even created a “truly evil” manual for other paedophiles.
The sick paedophile had also created a ledger, which contained horrific details of his abuse.
Huckle scored the scale of abuse that each victim suffered and from these sick notes, officers believe he could have targeted up to 200 young victims.
Since his arrest police have only been able to find photographic evidence of the horrific abuse of 29 children – aged between six months and 12.
Huckle has refused to hand over the passwords for encrypted areas of his hard drive.
Committed Huckle targeted vulnerable and poverty-stricken children while working in South East Asia as an English teacher.
He had first visited Malaysia when he was just 19 and on a gap year and when police managed to crack into part of his hard drive, they found more than 20,000 abuse images on his laptop.
At his trial, Huckle insisted he had “no regrets” about moving to Malaysia and in a chilling letter to his solicitors blamed “external factors” for his horrifying abuse.
Huckle hit out at the “poor attitude to child welfare” and “the pathetic, perverted lust of those who lured me onto the dark net”.
At his trial, his barrister told the court Huckle had little sexual experience with adults because he “lacked confidence with women”.
It took more than an hour to read out each one of the sick 71 charges, which included rape, sexual assualt and sexual activity with a child.
Huckle forced some victims to pose with sick slogans advertising his foul images, which he sold for Bitcoins on the TLZ website on the dark web – the encrypted version of the internet.
He even tried to make his paedophilia a full-time job by crowdfunding the release of his sick images.
Huckle targeted his victims by using his respected position as a teacher to gain access to the most vulnerable children in society.
Many of them were orphans and living in care and he even took one five-year-old out to celebrate her fifth birthday before molesting her at his home.
He also abused children while pretending to be taking them on a day trip from the children’s homes they were living in.
In one part of his sick plan, Huckle planned to marry one of his young victims and set up his own foster home.
He wanted to create a “cycle of children” that would live in his home and then move on so he could turn his sick abuse into a full-time role.
Sick Huckle also created a paedophile manual, Paedophiles And Poverty: Child Lover Guide.
He was finally arrested in December 2014 when he flew home to the UK to spend Christmas with his family.
Huckle was brought into custody as part of a huge international operation into a website on the dark web but because he had no criminal record, the twisted abuser was initially released on bail.
His parents grilled him about the charges and at first Huckle insisted he was innocent.
When he finally confessed his guilt, his parents refused to let him into the family home and he was placed back in custody.
He pleaded guilty to 71 of the 91 charges and on June 6, 2016, was handed 22 life sentences.
Sentencing Huckle, Judge Peter Rook QC, told him: “Your offending behaviour became entrenched in your everyday life.
“Your life revolved around your sexual activities with young children. Your distorted beliefs in respect of children are deep-seated. Your self-delusion knows no bounds.”
James Traynor, from the NCA’s child exploitation and online protection command, added: “Richard Huckle spent several years integrating himself into the community in which he lived, making himself a trusted figure.
“But he abused that trust in the worst possible way.
“He deliberately travelled to a part of the world where he thought he could abuse vulnerable children without being caught.”