Method for controlling variable speed operation curves by low head mitergate hydraulic hoist

The invention discloses a method for controlling variable speed operation curves by a low head mitergate hydraulic hoist, comprising: (1) connecting a computer with a hydraulic hoist; (2) setting a variable speed opening operation curve and a variable speed closing operation curve of the low head mitergate hoist in a computer; (3) controlling the operation time and the operation speed of the hydraulic hoist by the variable speed opening operation curve and the variable speed closing operation curve of the low head mitergate hoist. Controlling time and speed of the hydraulic hoist is carried out by using the variable speed operation curve of the hoist to satisfy the accurate variable speed opening and closing requirements of a navigation lock service gate, and the low head navigation lock can accurately determine closing and opening force on the premise of doing no model tests to fill the gap in China; the service gate has smooth operation, long service life and lowered maintenance cost under specified closing and opening time so as to avoid the phenomenon of big Marathi car, save power and improve economic benefit and social benefit.