Patterned and instrumentalization stair side protection device

The utility model discloses a patterned and instrumentalization stair side protection device which comprises square iron tubes. Each square iron tube is provided with fixing holes, the square iron tubes are fixedly connected with a vertical face of an elevator shaft through no less than two expansion bolts installed on the vertical face of the elevator shaft, and a telescopic connection square tube is fixedly arranged between every two adjacent square iron tubes. According to the device, an operator can directly operate on a stair flight, the device is convenient and quick to install and detach and wide in use range, patternization and instrumentalization are achieved, specifications are unified, batch production is facilitated, the safety coefficient is high, safety guarantees can be better provided, defects of a traditional process are made up for, meanwhile investment of manpower and material resources of construction is reduced, and construction cost is reduced. The lower portion of a protection guardrail