Posture adjusting mechanism and machine head folding system and method

The invention discloses a posture adjusting mechanism, a nose folding system and a nose folding method, relates to the field of aircraft assembly, and aims to realize fine adjustment in a three-dimensional direction through a simple structure. According to the technical scheme, the posture adjusting mechanism comprises a base, an X-direction movement mechanism, a Y-direction movement mechanism and a Z-direction movement mechanism; the posture adjusting mechanism independently controls the three-dimensional direction through an X-direction servo motor, a Y-direction servo motor and a Z-direction servo motor, movement in the three-dimensional direction does not affect one another, the control precision is high, and the structure is simple. According to the machine head folding system, on the premise that the folding precision requirement is guaranteed, the machine head folding assembly cost is reduced, and according to the technical scheme, the machine head folding system comprises a tool base, the tool base is