中铁二十三局集团建筑设计研究院有限公司，隶属于中铁二十三局集团。前身为达州市建筑设计研究院 , 始建于1979年。2013年，设计院完成改制后由中铁二十三局集团有限公司全资收购，更名为中铁二十三局集团建筑设计研究院有限公司。
China Railway 23rd Construction Bureau Group Architectural Design Institute Co., Ltd. is affiliated to China Railway 23rd Construction Bureau Group. It was formerly known as Dazhou Architectural Design Institute originally established in 1979. In 2013, the design institute was acquired by China Railway 23rd Construction Bureau Group Ltd. after restructuring and was renamed as China Railway 23rd Construction Bureau Group Architectural Design Institute Co., Ltd.
After pioneering and innovation with keen determination by generations of science and technology personnel, China Railway 23rd Construction Bureau Group Architectural Design Institute Co., Ltd. has developed into a comprehensive design unit with complete professional design supporting facilities, strong technical force and scientific management methods. It passed the ISO9001: 2000 quality management system certification in 2000. As at the end of 2013, the design institute had possessed Class A qualification of building trade (constructional engineering), Class B qualification for preparation of urban and rural planning, Class B qualification of professional geotechnical engineering of engineering investigation, and Class C qualification for labor service and municipal design. It is mainly engaged in engineering design of industrial and civil architectures, preparation of urban and rural planning, engineering geological investigation, geotechnical engineering construction, landscape architecture design, interior and outdoor decoration design, EPC, engineering cost consultation, etc. The Company has 150 employees and the number of professional technician accounts for 85% including 30 national chartered professionals. The Company has 4 functional departments, i.e. Development and Operation Department, Production Technology Department, Comprehensive Management Department and Planning and Finance Department; and over ten production departments, e.g. architectural design institute, planning design institute, geotechnical engineering institute, decoration design institute, engineering cost consultation office, etc. It has set an office base in Chengdu City.
In the long them, the design institute has constantly improved and perfected the quality assurance system based on the operation tenet of “quality first and credit foremost” and the service idea of “preciseness, integrity, high quality and innovation”, striving to improve design level, study assiduously, and conduct exploration and innovation. It has undertaken the design of a large batch of key projects and landmark buildings and completed many excellent architecture works with unique architectural styles and complete functions in Heilongjiang, Shandong, Inner Mongolia, Shaanxi, Yunnan, Guizhou, Chongqing and other provinces and a number of cities in Sichuan Province. It has successively obtained 10 provincial and ministerial awards for excellent survey and design and 28 municipal awards for excellent survey and design. Ever since its establishment, it has been commended by the Department of Construction of Sichuan Province, the government and competent departments in the place where the Company is located for many times and won many honorary titles, e.g. civilized unit, model unit of comprehensive governance, trustworthy unit of labor security, home of model staff, advanced unit of sanitation, etc. and rated as “AAA Law-abiding Integrity Unit” and “National Quality Trustworthy Unit”. Its science and technology archives have reached Chinese standards.