Data capacity is rapidly reaching its limit in modern op-tical communications. Optical vortex with spiral wave-front has been explored to enhance the data capacity for its unbounded quantum states of orbit angular momen-tum (OAM). However, traditional devices used to gener-ate OAM carrying beams suffer from bulky size. Surface plasmon polaritons (SPPs) have created an appealing platform to design various optical components with small footprints. Ultrathin plasmonic metasurfaces with phase abruptions exhibit the ability to break the traditional refraction and reflection law, which makes it possible for compact OAM generators.