The embodiment of the invention provides an elastic coupling which comprises a first half coupling, a second half coupling, first reeds and second reeds. The first half coupling and the second half coupling are provided with multiple embedded parts and containing spaces located on the two sides of each embedded part; each embedded part of the first half coupling is contained in the corresponding embedded part of the second half coupling, so that the first half coupling and the second half coupling are mutually embedded; each embedded part is provided with a top face and lateral faces; the lateral faces of each embedded part and the lateral faces of the adjacent embedded parts are opposite; the first reeds and the second reeds are fixed to the two opposite lateral faces of every two adjacent embedded parts respectively so as to abut against each other and transmit torque.