The present invention discloses a morpholinyl quinazoline compound crystal form, its preparation method and application. The crystal form I of the morpholinoquinazoline compound represented by formula A of the present invention has good stability, is not easy to absorb moisture, and has a simple preparation method, which is suitable for industrial production. This crystal form has important value for the optimization and development of drugs.本發明揭露了一種嗎啉基喹唑啉類化合物的晶型、其製備方法及應用。本發明之如式A所示的嗎啉基喹唑啉類化合物的晶型I有較好的穩定性，不易吸濕性，且製備方法簡單，適合工業化生產。此晶型對藥物的優化和開發具有重要的價值。
