In the practical application of laser selective melting technology, there will be some problems, such as prominent melting point and workpiece warpage, which will affect the quality of powder spreading and final formed workpiece. In order to improve the powder laying quality of laser selective melting, an L-type bidirectional intelligent scraper based on PZT-5H array is designed, and its sensor performance, single channel signal sensitivity and powder laying simulation are tested. The overall sensitivity of the scraper is 100 μm, which effectively improves the powder spreading quality of the intelligent scraper in laser selective melting, and lays a foundation for the intellectualization of subsequent additive manufacturing.