The present invention discloses an intelligent mower based on lidar map building, relates to a mower and solves the problem of low working efficiency caused by the requirements for manual re-measurement and parameter input implemented by working staff when different lawns are cut by using the mower, and the technical solution of the intelligent mower has the key points that the intelligent mower further comprises a master control module, a feature information module and a lidar scanning module; a lidar scanning module, a walking control module and a mowing control module; when a mower body is started, the master control module sends a starting signal and activates a constant-speed circumferential rotation unit and a laser transmitting and receiving unit to build an electronic map; and the master control module controls the walking control module to continuously walk and corrects the electronic map on different positions. According to the intelligent mower based on lidar map building, disclosed by the present invention, the mower body may realize automatic scanning without manual input and may automatically build and update the electronic map for cutting.