Objective: Ocean wave energy is an indispensable part of China's efforts to achieve carbon neutrality and contribute to the energy transition as a green renewable energy. However, the wave energy density in the coastal area is low, and the efficiency of wave energy converters placed there is also low. By optimizing the structural form and spatial layout of the WEC, or optimizing the parameters of the energy conversion system, the efficiency can be improved, but to a limited extent. In order to increase the wave energy captured by the WEC at the source, a parabolic wave energy focusing device is proposed, and the parabolic wave energy focusing device can concentrate wave energy into a certain area. The concentrated energy characteristics of parabolic wave energy focusing device are investigated, the suggestions and references for the integration of the device and WEC also provided. Methods: The concentrated energy characteristics of parabolic wave energy focusing device are investigated through physical model experiments and numerical simulation, and the influence of the focal distance change of parabolic wave energy focusing device on the focusing effect of wave energy is analyzed under different wave period conditions. The Boussinesq equation with improved dispersive characteristics is used to simulate the waves, and the cut-cell technique is used to solve the Boussinesq equations with complex structural boundaries. The Boussinesq equation is solved by an explicit second-order MUSCL-Hancock Godunov-type finite volume scheme, and the HLLC approximate Riemann solver is used to evaluate interface fluxes. The physical experiments were conducted in the 24-meter-wide wave basin at the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, China. The chord length l, and the focal length, L_f, of the parabolic wave energy focusing device, were 18 and 4.22 m, respectively. Results: The numerical simulation results are consistent with the physical experimental results. All the results showed that: 1) With the change of focal distance and incident wave period, the wave energy focusing point reciprocate periodically around the theoretical focal point; 2) When the ratio of focal distance to half wavelength is approximately an integer multiple, the wave energy focusing point coincides with the theoretical focal point; 3) The smaller the focal distance or the shorter the wave period, the better the wave energy focusing effect at theoretical focal point; 4) The wave energy focusing area is symmetrically distributed along the chord length with the theoretical focal point as the center, and with the decrease of the focal distance, the wave energy focusing effect on the side of the wave incident direction is gradually weakened. Conclusions: By physical model experiment and numerical simulation, the concentrated energy characteristics of parabolic wave energy focusing device are investigated. The parabolic wave energy focusing device can concentrate wave energy into a certain area, and significantly increase the wave energy captured by the WEC. Thus, the efficiency of the wave energy converters can be improved.