The utility model provides a take protection frame of prefabricated outer wall hanging plate construction usefulness of window of wafing, belongs to construction technical field. Its characteristics are: the support of protection frame is the right angle tripod of being made by the square steel, has at the right angle tripod and to pass the planar bolt hole in right angle perpendicularly, the square steel base on the horizontal limit of tripod, the perpendicular through -hole that upwards can wear the bolt wholly constitutes steel right angle triangle protection frame and supports, two pairs of steel right angle triangle protection framves support, and each passes three last screws of triangle protection frame support by three bolt symmetrical ground, fastens on two vertical frame walls of the window that wafts, support in two pairs of steel right angle triangle protection framves by the ledger board on the dual -purpose board in bolt -up right angle, the ledger board constitutes the dual -purpose board in right angle with perpendicular installation of guard plate. Its positive effect does: the extensive applicability of system is general for this protection frame, not restricted by wall body size and window size, installation that protection frame supported with remove very convenient, only a small number of manual works can accomplish, use manpower sparingly cost and time limit for a project, factor of safety is high, is a protection frame of practicality.