  In the present paper, we first investigate a new locally constrained mean
curvature flow (1.9) for starshaped hypersurfaces in hyperbolic space Hn+1 and
prove its longtime existence, exponential convergence. As an application, we
establish a new sharp Michael-Simon inequality for mean curvature in Hn+1. In
the second part of this paper, we use a locally constrained inverse curvature
flow (1.11) in Hn+1, which was introduced by Scheuer and Xia [30] to establish
a new sharp Michael-Simon inequality for k-th mean curvatures of starshaped and
strictly k-convex domain.
