  We show that Multiple Weyl and double Weyl points arise in a chiral elastic
system through stacking many two-dimensional honeycomb mechanical structures.
On the distinct kz plane, the band structures calculated from tight-binding
model exhibit the presence of Weyl points at Brillouin vertices and double Weyl
Points at Brillouin centre. Based on the tight-binding model, we design a
practical chiral mechanical structure which can be fabricated by current 3D
printing technology. The numerical calculation illustrates several Weyl and
double-Weyl points as expected in our analysis of tight-binding model. To
verify the topological feature, topological charges of every degeneracy are
calculated. Within these Weyl points, we theoretically prove that the existence
of topologically protected surface modes, and their robustness against defects
are also demonstrated.
