Zef Gjoni, 28, attacked his wife at their home in Thornton Heath and then claimed to police she had cut herself due to being kept away from her family over lockdown.
But a court heard he set upon her with two knives after realising she had taken her phone to the bathroom and contacted a family member at around 4am on April 1 2020.
Gjoni had stopped her from contacting her mother in Romania just hours before.
She was found suffering a total of at least 17 discernible stab wounds and a collapsed lung.
During the attack, Gjoni put a duvet over the victim’s head and asked: “Have you not died yet?”
The victim pleaded for Gjoni to stop and call an ambulance.
When he finally called 999, he told the operator that he and his wife had had an argument and that she had stabbed herself in the heart two or three times.
Police and paramedics arrived and the victim was able to tell them through a Romanian interpreter that the injuries had been inflicted by Gjoni.
He was arrested at the scene.
On Friday at Croydon Crown Court, Gjoni was sentenced to 19 years in prison and a further five years on extended licence.
Thea Viney, from the Crown Prosecution Service, said: “This was a senseless and violent attack inside a marital home.
“Zef Gjoni armed himself with two kitchen knives before launching an unprovoked attack on his own wife just because she wanted to speak to her family. The victim who has since left the country, is lucky to be alive.
“During police interview Gjoni told officers that the Coronavirus lockdown had upset his wife because she was being separated from her family in Romania. He told them she had been cutting herself in the bathroom, but the jury was able to see through this blatant lie.
“The prosecution case included medical evidence and statements from the victim who had to spend two weeks in hospital recovering from her stab wounds.
“The CPS is absolutely committed to securing justice for victims of domestic abuse and will always prosecute these cases where there is the evidence to do so.”