Connection fitting and protection window net

The invention relates to a connection fitting and a protection window net. The fitting comprises a connector, a buckling piece and a draw-in bolt. A buckling piece sleeving part is arranged on the connector, and a limiting plate is arranged in the buckling piece sleeving part. The connector is connected with a frame. One end of the buckling piece is sleeved with the buckling piece sleeving part, and the other end of the buckling piece is buckled with a window flange of a building window. The draw-in bolt is in threaded connection with the limiting plate and the buckling piece in sequence. When the draw-in bolt is screwed, the window flange is buckled by the buckling piece, and the frame is driven to be closely attached to the edge of the window. The protection window net comprises a protection steel frame, a mosquito prevention gauze element, magnetic joint strips and the connection fitting, wherein the magnetic joint strips are arranged along a frame of the mosquito prevention gauze element, the mosquito prevention gauze element is attracted to the protection steel frame through the magnetic joint strips, the connectors are connected with the protection steel frame, and when the draw-in bolts are screwed, the window flange is buckled by the buckling pieces, and the protection steel frame is driven to be closely attached to the edge of the window. The connection fitting and the protection window net have the beneficial effects that mounting is convenient and safe, connecting is stable and reliable, and nondestructive mounting and attractiveness can be guaranteed.