  We report the progress on the lattice QCD calculation of the glue spin
contribution to proton spin. This calculation is carried out with valence
overlap fermion on 2+1 flavor DWF gauge configurations at two lattice spacings
with the momentum of the frame in the kinematic range $0\leq p^2 \leq 2$
GeV$^2$. A mild frame dependence is observed. The matching and mixing with
large-momentum effective field theory are in progress. The unrenormalized
result at $p^2=4$ GeV$^2$ with $O(a^2)$ correction gives $S_G$ = 0.13(3).
