The former Middlesbrough forward arrives at the Towbar Express Stadium and adds to Nathan Haslam's attacking options.
Walker becomes the Seasiders' second signing of the day, adding to the arrival of Jamie Bramwell on loan from Grimsby Town.
Featuring for Boro through various age groups, making his under-18 debut in the 2016/17 season, Walker has also represented England up to under-19 level.
The striker also featured for Boro's first team for the first time in August 2018 before being rewarded with a new contract at the Riverside Stadium.
Loan spells at MK Dons, Crewe Alexandra and Tranmere Rovers followed before he was released in 2022.