Small hydropower is an important way to realize power supply in remote areas of Tibet. However, constrained by economic and social development and natural geographical conditions, the development of Tibet's small hydropower faces a series of barriers. If these barriers cannot be dealt with reasonably, Tibet's small hydropower will not achieve long-term development. After the literature retrieval, eight kinds of barrier factors to the development of small hydropower in Tibetare summarized. Through the questionnaire survey, the influence degrees of these barrier factorsare ranked. The results show that all the barrier factors have great influence degrees, among which the top five barrier factors are fragile ecological environment, backward supporting infrastructure, policy uncertainty, investment recovery and profitability, and harsh natural climate conditions. The comprehensive understanding of the barrier factors faced by the development of Tibet's small hydropower and the reasonable response will achieve long-term stable development of Tibet's small hydropower.