I have sever pain in my knees lower back and the plantar of my feet i bearly could walk what type of specialist should i see ?

Orthopedic surgeon: You need someone to screen your orthopedic complaints and a general orthopedic surgeon is a good start. Physcal medicine doctors or "physiatrists" also can be your starting point. If there is any family history of musculoskeletal complaints a rheumatologist could be considered.

An orthopedist: As a podiatrist i would look for flat or pronated feet. This could potentially cause the symptoms you describe.