A man who raped his stepdaughter 1,800 times from the age of 10 and then beat her when she fell pregnant has been jailed for 15 years.

Axar.az reports citing Dailymail that, the man, from Kingaroy, northwest of Brisbane, was on Friday found guilty of maintaining a relationship with a child, rape and assault, The Courier Mail reported.

The court heard the 41-year-old man started violating the girl from the age of 10 over a six-year period, until the victim ran away from home at age of 16.

During the six-year ordeal, it's estimated he raped her 1,800 times, and after getting her pregnant, he bashed her in an attempt to make her miscarry, the court was told.

But even after the teenager gave birth to the man's son at age 15, he continued to rape her - often in front of the newborn child - in the family home.

The abuse took place while the girl's mother was out or in another room, and it remains unclear whether she knew the offending had taken place.

When Judge Deborah Richards sentenced the man in Brisbane District Court on Friday, she said he had also attacked the girl when the family lived interstate.

While the man wasn't charged for the attacks that happened interstate, Judge Richards took the offending into consideration during sentencing.

'The fact that she was impregnated by you and you still offended against her - there were rapes from 10 years of age - this was persistent, brazen, violent,' Judge Richards said.

The court heard he tried to get the girl to have an abortion, and when she declined he brutally beat her in the stomach, saying: 'There are always ways to kill it.'

The judge said as the girl became older the offending escalated - and the man used rape as a way to 'punish, control and humiliate' her.

Despite fleeing the man, the victim, now 19, reportedly struggles with everyday life, and often feels suicidal as a result of having to raise his four-year-old son.

In a statement tendered to the court, the 19-year-old said she longed for a 'normal life' and, looking back, she just wanted to be a regular teenager like other kids.

On Friday, Judge Richards recalled the events that led up to the then 16-year-old making the desperate decision to flee the man forever.

She described how the man raped the girl after she confronted him to say he had ruined her life - and then he did it again later that day after taking the child away from her.

'You took the child away and said you didn't get to finish and raped her again,' Judge Richards said.

Shortly afterwards, the 16-year-old fled the home and has never returned.

Judge Richards said the man had shown no regard for the victim - aside from acknowledging she was struggling with mental health after he was charged.

He was jailed for 15 years and will be eligible for parole in 2030.