Objective To study the effectiveness, safety and tolerance of testosterone undecanoate （TU） in improving exhaustion and quality of life （QOL） of the elderly male patients with chronic disease in advanced stage. Methods Using a simple randomized controlled trial design, eighty patients were randomized into two groups. The treatment group took routine therapy and TU and the control group with routine therapy alone. Results 1. Baseline characteristics in both groups were similar. 2. The PADAM grade decreased, and the QOL scale increased in the treatment group （P〈0.05 ）. 3. Serum total testosterone in the treatment group rose, upper arm circumference and right hand grip improved （P〈0.05 ）. 4. There were no significant differences in adverse effects between both groups. Conclusions TU can improve the clinical health status in the elderly male patients with chronic disease in advanced stage and increase serum testosterone level, there is a satisfactory tolerances and few adverse reactions.