The spinless p+ip topological superconducting ground state will trap a single Majorana zero mode in its vortex core.Recently, such a new kind of superconducting state has been intensively studied for the purpose of topological quantum computation.In this talk, I will show the emergence of spinless p+ip topological superconducting ground state in infinite-U Hubbard model on honeycomb lattice, from both state-of-art Grassmann tensor-network numerical approach and quantum field theory approach.I will propose a new mechanism for superconductors in strongly correlated system beyond BCS theory.I will also discuss a possible experimental realization in realistic materials.