The invention discloses a deep foundation pit/deep trench anti-landslide operation protective cage. The deep foundation pit/deep trench anti-landslide operation protective cage comprises a rectangular frame. Reinforcing plates are arranged on a plurality of positions of the rectangular frame, and other faces of the rectangular frame except the bottom face are provided with protective nets. One side edge and the top of the rectangular frame are each provided with a movable door. A corner composed of a cross beam and a vertical plate of the rectangular frame is provided with an alarm positioning device which comprises a protective box, and the protective box is internally provided with a controller, a power supply module, a wireless communication module and a positioning module; and the protective box is externally provided with an alerter and a control switch, the signal input end of the controller is connected to the power supply module, the positioning module and the control switch, and the signal output end of the controller is connected with the wireless communication module and the alerter. According to the deep foundation pit/deep trench anti-landslide operation protective cage, manufacturing cost is low, the protective effect is good, the safety hazard during operating in a deep foundation pit can be greatly lowered, and personal safety of operating personnel is ensured to the greatest extent.