Abstract: A wind power blade multi-robot cooperative grinding and roller coating operation assembly line system is provided and includes: a working platform; a blade tip transfer and tooling turning system and a blade root transfer and tooling turning system arranged on a middle of the working platform and configured to support and adjust a head and a tail of the wind power blade respectively; wind power blade automatic grinding robots and wind power blade automatic roller coating robots symmetrically arranged on the working platform and located on two sides of the wind power blade. An automatic processing of grinding and roller coating of wind power blades is realized, which can reduce labor intensity. An integration of omnidirectional transfer and weight of the wind power blades is realized, which can detect the weight in real-time. A blade sprain is avoided effectively, and a layout of an assembly line is more flexible.