Elevator guard rail assembly and elevator

The protective guard assembly comprises a guide rail, a guard bar and a pulley block, when a bearing platform is located at the lowest height for loading, the difference between the bottom of the guard bar and the lowest height does not exceed a first safety distance, so that a worker does not need to open a door on the guard bar by mistake, and the safety of the worker is guaranteed. At the moment, the top of the guardrail exceeds the specified height and is larger than a second safety distance, so that the guardrail serves as a safety door at the specified height to be closed, in the process of ascending to the specified height after loading, under the action of the pulley block, the bearing platform ascends, and the guardrail gradually descends under the action of gravity; when the door on the fence is opened by mistake, the guardrail shields the door outside to prevent the door on the fence from being opened, safety accidents are avoided, when the bearing platform ascends to the designated height, the top