Studies of hadron spectroscopy are at the frontier of modern particle physics to promote the understanding of the nonperturbative property of low energy QCD. Multibody BB decays provide a unique platform for the experimental studies of excited hadrons (resonances). The information of the BB decay topology enables the utilization of amplitude analysis, a powerful technique that can precisely determine the mass, width, as well as spin-parity, of excited hadrons. The LHCb experiment is dedicated for efficient and precise reconstruction of heavy-flavor hadrons, and thus is an ideal platform for the studies of intermediate resonances in BB decays. In this seminar, I will present some recent studies of hadron spectroscopy to multibody BB decays at LHCb. New resonances containing charm quark(s) were observed with their properties measured using amplitude analysis, providing important experimental inputs to theoretical studies of hadron spectroscopy.