Abstract: Abstract:This article introduces a current situation about hydraulic headstock gear in hydraulic and hydropower engineering in our country. Based on the hydraulic cylinder, the double cylinder synchronization of double hanging point hydraulic headstock gear, and cleanliness of hydraulic system, this article analysis the key technical problem exist in our selfdesign hydraulic headstock gear . It suggests that the design and manufacture of our hydraulic and hydropower system could be used under different situation by technicians to drawing advanced foreign technology and experience, therefore, to enhance our technological state of hydraulic headstock gear.

Key words: Keywords:hydraulic headstock gear, hydraulic cylinder, double cylinder synchronization, hydraulic oil, cleanliness