Mr Willie, a former primary school teacher, said there was one full-time school psychologist available for every 878 students in Tasmania and one school nurse for every 1844 students.

"Their case loads are huge, they're dealing with not only mental health challenges for students but also cognitive assessments, supporting student learning ... there's a whole lot of things they have to do," he Willie said.

"There's not enough of them to go around and we think during this uncertain time, which is really challenging for young people, that extra support is needed in our schools."

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Mr Willie said Labor's proposed policy would cost $10 million per year.

"It's backed by evidence too, we're well aware of service providers saying there's been a spike in mental health challenges for high school students," he said.

"Budgets are all about priorities and we won't apologise for prioritising young peoples mental health and wellbeing and we'll make that a priority of an incoming Labor government budget."

According to Education Minister Jeremy Rockliff, the government had employed 65 more support staff, which included school nurses, psychologists and social workers.

"All schools and students have access to these support services," Mr Rockliff said.

"For students who require professional support and access to a school psychologist, that resource is already available at every school."

Mr Rockliff said the government's last budget included funding for another eight school nurses to work in Tasmania's eight Colleges.

"These positions, which were cut under Labor, are a huge success in schools with nurses assisting students who are suffering from stress, eating disorders and other mental health issues," Mr Rockliff said.

"There is no one single solution to dealing with mental health issues which is why we have taken a holistic, multi-faceted approach to supporting students."

The government was already spending $81 million to support mental health and wellbeing in schools, Mr Rockliff said.