The campaign builds on the work of the We Need To Talk campaign, led by five mental health charities, and is supported by the Royal College of Psychiatrists.
RCGP feedback suggests that while access for adults has improved over recent years, it remains patchy. Access for children remains poor.
NICE guidelines recommend several psychological therapies for people who have mental health problems, but most of those who need them cannot get access.
GPs who should refer people for psychological therapies say they are often unable to do so.
RCGP chairman Professor Steve Field said: 'We welcome the substantial investment that has been made over the past few years.'
He added: 'We fully support the campaign to ensure that adequate funding continues to go into training therapists, roll-ing out talking therapies across England and making provision for children.
'Even if there is a financial squeeze, the evidence is there to suggest that the country will save money in the short and long term.'