The invention relates to a pharmaceutical composition for treating degenerative diseases and application thereof. The pharmaceutical composition is particularly suitable for preventing and treating Alzheimer's
disease (AD). The pharmaceutical composition disclosed by the invention comprises a combination of a PDE4 inhibitor and a PDE10A inhibitor, and can be used for remarkably activating a cAMP-PKA-
CREB signal channel, enhancing the stress tolerance of neurons, reducing the
pathological accumulation of A beta and p-tau and improving the
plasticity of nerves. The invention provides an innovative
medicine composition with potential clinical application value, and a new strategy is provided for intervention of neurodegenerative diseases.