Rehabilitation mechanical hand with independently adjustable distances among fingers and detachable five fingers

The invention discloses a rehabilitation mechanical hand with independently adjustable distances among fingers and detachable five fingers. The rehabilitation mechanical hand comprises a palm part anda finger part, wherein the finger part comprises four finger structures and a thumb structure, and each of the thumb structure and the finger structures comprises proximal metacarpal bone, an MCP joint, a first phalanx and a PIP joint; a connecting plate I is arranged at the tail end of the proximal metacarpal bone of the thumb structure, and longitudinal sliding chutes are arranged in the connecting plate I; an I-shaped connecting plate II is arranged at the tail end of the proximal metacarpal bone of each finger structure; the palm part comprises a palm bottom plate, a palm adjustable baseand a thumb connecting guide rail; arc-shaped sliding grooves and clamping grooves are arranged in the palm adjustable base; the thumb connecting guide rail tallies with the longitudinal sliding chutes in the connecting plate