The CPS says it made the decision to charge Elphicke after reviewing a file of evidence from the Metropolitan Police.
Charlie Elphicke, the Conservative MP for Dover, has been charged with three counts of sexual assault against two women.
Elphicke will appear at Westminster Magistrates’ Court on 6 September.
He is alleged to have attacked the first woman in 2007 and the second woman twice in 2016.
In a statement, the Crown Prosecution Service said: “The CPS made the decision to charge Mr Elphicke after reviewing a file of evidence from the Metropolitan Police.”
A senior Downing Street source has Elphicke has had his whip suspended.
Elphicke was previously suspended from the Conservative Party in November 2017 after “serious allegations” against him were referred to police.
Theresa May controversially restored the Tory whip to him 13 months later, in December, before she faced a vote of no confidence.
The 48-year-old, who is believed to have voted against Mrs May in the no confidence vote, tweeted in December: “Important for my constituents to know that, 13 months after having it withdrawn, I have been given back the Conservative whip.
“I remain as confident as I always have been of clearing my name and will continue to work as hard for Dover & Deal as I always have done.”
In a statement, Elphicke’s solicitor said: “Charlie Elphicke has said from the outset that he denies any wrongdoing. He will defend himself vigorously and is confident that he will clear his name.”
Mr Elphicke’s Constituency Association chairman, Keith Single, said: “Throughout the last 20 months since these allegations were first made, Charlie has had our full support.
“That support will continue. Basic British values require that everyone remains innocent until proven otherwise.”