This　paper　investigates　the　modeling,　simulation　and　vibration　analysis　of　power　transmission　line　robot　modeled　based　on　mass　spring　damper　concept.　The　robot　was　design　to　move　along　the　transmission　line　with　the　help　of　two　rollers.　The　transmission　line　was　assumed　to　oscillate　as　the　robot　moves,　thereby　generating　a　disturbance　to　the　robot.　A　pulse　input　signal　was　used　as　the　disturbance　to　assess　the　behavior　of　the　robot.　Comparative　assessments　have　shown　that　the　vertical　position　and　angular　orientation　of　the　robot　are　dependent　on　the　magnitude　of　the　input　disturbance　and　the　weight　of　the　robot.