The invention relates to the technical field of renewable energy source utilization, and discloses a wave longitudinal and transverse kinetic energy capturing power generation device. The wave longitudinal and transverse kinetic energy capturing power generation device comprises a wave energy collecting system installed on a gear lifting stabilizing system and a wave energy converting system arranged at the upper portion of the wave energy collecting system. A method that compression rubber is installed on the wall face of a pressurizing air cylinder is adopted in the wave energy collecting system for collecting energy generated during the longitudinal and transverse reciprocating movement of waves. In the wave energy converting system, two high-pressure gas moving cavities in a split high-pressure air cylinder are used for alternately conducting acting, and accordingly generated energy can be continuously supplied to a power generator. The gear lifting stabilizing system can vertically adjust the elevation of the whole wave energy capturing power generation device according to the water level. The wave longitudinal and transverse kinetic energy capturing power generation device integrates high efficiency, high applicability and high reliability, the construction cost is low, wave energy can be efficiently collected, transmitted and converted, the wave longitudinal and transverse kinetic energy capturing power generation device is suitable for different sea conditions under multiple sea area conditions, and continuous and efficient sea wave energy development and utilization become possible.