The utility model provides a without traffic interruption's highway tunnel maintenance and reinforcement platform and device relates to the tunnel field of building. This without traffic interruption's highway tunnel maintenance and reinforcement platform includes detachable support chassis, the top layer operation panel, the top layer goes up and down to maintain the platform, first lift post andsupporting seat, the top layer operation panel is installed in detachable support chassis's top, the top layer goes up and down to maintain the top that the platform is located the top layer operation panel, the one end and the top layer operation panel sliding connection of first lift post, the other end and the top layer of first lift post goes up and down to maintain the bottom surface fixed connection of platform, the embedded the control unit that is equipped with of first lift post, a control unit is including the first signal receiving module, a processing module and first lift drive module, detachable support chassis install in the top of supporting seat, supporting seat are formed with the car passageway. The position of the removable maintenance of operating personnel and the operation posture of maintenance, can be more convenient to maintaining in the tunnel, the car can be followed the car passageway that the supporting seat formed and passed through, it is normally current not influence the traffic.