This study is intended to construct early lung rehabilitation training programs for adult patients after double lung transplantation, including safety assessment, exercise training, respiratory function training, psychological support and health education, with a view to helping double lung transplant patients achieve lung rehabilitation at an early date, improve patients' motor endurance and respiratory function, and improve the quality of near- and long-term survival.

The first stage constructs the lung rehabilitation program, and the second stage implements the non-contemporaneous study control trial.

Inclusion Criteria:

• age ≥ 18 years
• consent to early lung rehabilitation
• informed consent to this study.

Exclusion Criteria:

• Unstable condition, not allowed to receive pulmonary rehabilitation treatment
• A person with a mental disorder who cannot cooperate.