Exercise intervention is effective in preventing falls in patients with Parkinson's disease. However, there are different types of exercise intervention with inconsistencies in the intensity and frequency, and controversy over the efficacy. Through a comprehensive review of literatures and systematic analysis, this paper compared the effects of different exercise intervention methods on preventing falls in patients with Parkinson's disease. It was found that Tai Ji was the most effective method in reducing falls in patients with mild to moderate Parkinson's disease, followed by balance training, while progressive resistance strength training was less effective. As a new intervention method, cognitive gait dual task training has certain advantages and is worthy of further studies.