Aircraft nose locking structure and double entry saw of double entry saw

The utility model discloses an aircraft nose locking structure and double entry saw of double entry saw. Aircraft nose locking structure includes: the snap close piece, it is located on among the frame that the double entry was sawed and the carousel of working no. 1, wherein, be in be equipped with the overlap joint body on the snap close piece the frame with be equipped with on work another person among the carousel can with the overlap joint bodily form becomes the overlap joint ligand of hasp, the overlap joint body does convex part or concave part on the snap close piece, and the overlap joint ligand is mating concave part or convex part, the snap close piece can move between latched position and non - latched position latched position, overlap joint on the snap close piece body with the overlap joint ligand combines together non - latched position, overlap joint on the snap close piece body with the overlap joint ligand is thrown off each other.