There are many research literatures on the influence of oil cavity structure on the performance of hybrid bearing.A wealth of knowledge on oil cavity structure design has been accumulated.How to efficiently transform this knowledge into innovative results is worthy of research and exploration.Guided by TRIZ theory,a set of knowledgebased innovative design methods for the oil cavity structure of hybrid bearing were proposed.Taking the lubrication performance to be satisfied by the oil cavity structure as a design guide,the attribute table of oil cavity structure design was established and the innovative angle of the oil cavity structure was summarized.The attribute table corresponding to the TRIZ engineering parameters was established,the inventive principle was found by using the contradiction matrix table,and the innovative design scheme of the bearing oil cavity structure was proposed by combining the highly abstracted inventive principle with the innovative angle of the oil cavity.By using this design method,a new sixcavity structure hybrid bearing was proposed and verified by FLUENT.It is shown that the bearing capacity of the sixcavity structure hybrid bearing is superior to the fourcavity hybrid bearing when the shaft axis is inclined