  On the basis of the state parameter of de Sitter space-time satisfying the
first law of thermodynamics,we can derive some effective thermodynamic
quantities.When the temperature of the black hole horizon is equal to that of
the cosmological horizon, we think that the effective temperature of the
space-time should have the same value. Using this condition, we obtain a
differential equation of the entropy of the de Sitter black hole in the
higherdimensional de Rham, Gabadadze and Tolley (dRGT) massive gravity. Solving
the differential equation, we obtain the corrected entropy and effective
thermodynamic quantities of the de Sitter black hole. The results show that for
multiparameter black holes, the entropy satisfied differential equation is
invariable with different independent state parameters. Therefore, the entropy
of higher-dimensional dS black holes in dRGT massive gravity is only a function
of the position of the black hole horizon, and is independent of other state
parameters. It is consistent with the corresponding entropy of the black hole
horizon and the cosmological horizon. The thermodynamic quantities of
self-consistent de Sitter spacetime are given theoretically, and the equivalent
thermodynamic quantities have the second-order phase transformation similar to
AdS black hole, but unlike AdS black hole, the equivalent temperature of de
Sitter space-time has a maximum value. By satisfying the requirement of
thermodynamic equilibrium and stability of space-time, the conditions for the
existence of dS black holes in the universe are obtained.
