  We investigate tight monogamy relations of multiparty quantum entanglement
for any quantum state in this paper. First, we obtain a class of lower bounds
for multiparty quantum systems which improve the previous results. Next, we
establish a class of tighter monogamy relations in tripartite quantum systems
by means of the new inequality. Furthermore, we generalize this relations to
multiparty quantum systems. And then we prove the lower bounds we obtained are
larger than the existing ones. Detailed examples are provided at last.
