  We propose a new method to determine the spin of Higgs bosons at the LHC by
using the decay products of black holes. Black holes may be produced if
TeV-scale gravity theories are correct, and black holes decay into several
particles. This decay results in the emission of high energy particles,
including Higgs bosons. The difference of the degree of freedom between spin 0
and spin 1 Higgs bosons leads to a difference of the number of reconstructed
Higgs bosons. From this fact, we can determine the spin of Higgs bosons with $5
\sigma$ significance by using the integrated luminosity L = 2.4 fb^-1, which
can be accumulated in only one month operation.
