Duane Dyer also threatened to kill her mother and attack her dead baby’s grave as he bombarded her with over 200 text messages.
The woman told Nottingham Crown Court that she broke up with Dyer in March this year as he had a drinking problem that caused him to become violent and nasty.
She said Dyer threatened to stab her and made “countless” other threats that left her fearing for her life.
Police arrested the 40-year-old – who has 49 convictions for 122 offences over the last 25 years, which includes 17 offences of violence – after the woman showed officers some of the messages.
But in a twisted plot to get the woman locked up instead, he dishonestly claimed she held a knife to his throat and slashed his stomach. The court heard he even showed officers self-inflicted injuries to corroborate his false account.
In a victim impact statement, the woman said: “I genuinely believe he enjoys scaring me. I'm not the only one who fears Duane. If he doesn't get his way he kicks off.
“I fear him so much and feel trapped. I have known him for a long time and I regret every minute of it. He thinks I am his possession.”
Dyer, of Nene Walk, Worksop, pleaded guilty to putting a person in fear of violence and intent to pervert the course of justice.
He was jailed for two years and seven months.
Following the sentencing, Detective Inspector Craig Hall, of Nottinghamshire Police's public protection team, said: “This was a consistent onslaught of abuse that led to a woman and her family fearing for their safety.
“The victim has been incredibly strong throughout this case and I would like to commend her for her bravery in supporting our investigation.
“I am pleased with the sentence and hopefully with Dyer behind bars he will be able to reflect his actions and the victim can move on with her life.
“I hope that this conviction demonstrates our commitment to survivors of these types of offences, and that when incidents are reported our officers will do everything in their power to bring offenders to justice.”