Abstract: Flower structures are the typical products of tectonic deformation in strike-slip fault zones. In conventional studies, flower structures can be divided into two types based on the differences in their internal structural architecture, i.e., negative and positive flower structure. The oil-gas exploration reveals that besides the above two types of flower structure, a special flower structure is developed in the transtensional deformed zone of the Cenozoic Tan-Lu fault in the Bohai Sea, i.e., a hybrid flower structure characterized with the assemblage of anticline and normal fault. Through analyzing the characteristics and formation mechanism of hybrid flower structure, the results indicate that it is developed in the fault restraining bend under transtensional deformation, presenting the co-existence of strike-slip, compression and extension as well as the synchronization of compressional and extensional deformation. The hybrid flower structure can be considered as a typical and complex deformation pattern, as the result of extension, compression and strike-slip under the local compressional environment, and its stress state is during the transition stage from the negative to positive flower structure. With special tectonic pattern and setting, the hybrid flower structure is favorable to hydrocarbon accumulation.