This study aims to explore the effectiveness of cardiac rehabilitation exercise therapy in improving the quality of life of patients with chronic heart failure during hospitalization and after discharge. The specific research content includes screening patients who meet the diagnosis of \"chronic heart failure\" among cardiovascular inpatients from October 2024 to October 2025. Among these patients, those who meet the inclusion criteria and can participate in the study for more than three months are selected. After a detailed explanation, they sign an informed consent form. Finally, eligible patients are included in the study and divided into a control group and an observation group using a random number table method. Various indicators of the enrolled patients are monitored and recorded, including: general information (gender, age, height, weight, BMI, etc.) Educational background, medical history, medication history, laboratory test results, 6-minute walk test results, New York Heart Association (NYHA) cardiac function grading, ultrasound examination results, Minnesota Heart Failure Quality of Life Scale, 1-year mortality assessment for heart failure patients, and prognosis evaluation for chronic heart failure patients. Patients in the control group received routine cardiac rehabilitation guidance; Patients in the observation group receive routine cardiac rehabilitation guidance and develop corresponding rehabilitation exercise therapy prescriptions based on their condition: ① Patients with heart function level I perform slow walking, climbing stairs, and standing aerobic exercises; Grade II patients undergo slow walking and standing aerobic exercises; Grade III patients perform aerobic exercises on bedside seats; Grade IV aerobic exercise on the bed. Guide and supervise two groups of patients to engage in rehabilitation exercises during hospitalization, and record the required indicators during exercise. After discharge, the patient will be followed up for a period of three months. The rehabilitation exercise data will be accurately and completely recorded in the form of a diary by the patient and/or family members, and feedback will be provided weekly, including time, location, exercise time, exercise method, heart rate, and other data. Guidance on home rehabilitation exercise therapy for the observation group: ① Warm up exercise for 5-10 minutes (to awaken the body through warm-up exercise and reduce strains during exercise). Choose the warm-up exercise method according to your own situation, including \"chest expansion exercise, dynamic back extension, standing shoulder activation, foot wrap around the\" 8 \"shape, knee joint warm-up, standing lateral flexion, full body stretching, relaxation jumping, slow jogging in place, and continuous knee strikes\" Aerobic exercise with the help of community sports equipment. The duration gradually increased from 10-20 minutes each time to 30-40 minutes; The intensity gradually increases from 55% maximum heart rate to 60%, not exceeding 85% (maximum heart rate (beats/minute)=220- age (years)); The frequency gradually increased from 3 days/week to 5 days/week; Sports equipment can be selected based on community equipment, such as elliptical machines, Tai Chi massagers, cycling machines, spacewalkers, treadmills, etc Rest (if discomfort occurs during exercise, immediately stop exercising and rest in place). This study used experimental and observational methods to analyze and evaluate various indicator data at admission, discharge, and 3 months of home rehabilitation. Ultimately, it was concluded that cardiac rehabilitation exercise therapy is effective and worthy of promotion in improving the quality of life of patients with chronic heart failure.