Wall said last week that he personally has changed his position from the idea of reforming the upper house, to scrapping it altogether.
He said he came to that decision with difficulty, but reform would be more difficult than abolition.
The Sask. Party's official position is that the Red Chamber should be reformed, but Wall said he's given up on that idea.
"It means an equal body where each province has equal representation," Wall said Wednesday. "That's what meaningful reform means and I'd like to see that too ... and I'd like to see money trees in Saskatchewan. They're not going to happen."
A resolution to abolish the Senate was defeated at the party's last convention in November.
But now Wall wants a referendum asking Saskatchewan Party members to vote on the question again.
The party says mail-in ballots will be sent out over the next few weeks, with the results announced in early July.
Abolition is something the Opposition New Democrats already support.
Wall says if his members do too, he will raise it with his counterparts at premiers meetings this summer.
Wall is turning up the heat on abolishing the Senate following the furor over the Senate expense scandal.
Senators Mike Duffy, Pamela Wallin, Mac Harb and Patrick Brazeau have all come under official scrutiny over their expenses.