PIC fan-out transfer optical waveguide chip is based on the femtosecond laser direct writing technology mastered by Shenzhen Photonics Valley. It can match self-developed PIC, mainstream PIC, customize FA, MT ferrule, MCF and other chips, device end-face optical port arrangement, realize the processing and preparation of arbitrary three-dimensional shape structure, and provide possibilities for the fan-in and fan-out requirements of optical chips. Through femtosecond laser direct writing technology, miniaturized, low-loss three-dimensional optical waveguide chips with low transmission loss, circular cross-section and high symmetric mode field can be prepared on glass substrates, which is of great significance for the realization of high-density optical interconnect products.