The invention discloses a comprehensive support system for concrete expansion joint construction quality control in a severe cold area and belongs to the field of civil engineering. The comprehensivesupport system comprises (1) a severe cold area concrete expansion joint construction structure, (2) a newly mixed concrete temperature supporting measure, (3) a concrete heating circuit layout scheme, (4) a concrete temperature measurement layout scheme, (5) a concrete temperature keeping curing method, (6) a heating circuit measurement and control scheme, and (7) a concrete strength developmentprocess calculation method based on an equivalent age. The system disclosed by the invention is used for systematically supporting the concrete expansion joint construction quality from multiple aspects such as concrete material preparation, heating method and implementation manner, curing measures and strength development monitoring method and the like based on the structural form, loading condition and service performance requirement of the concrete expansion joint. The time of terminating curing of the concrete expansion joint or opening to traffic can be determined by contrasting a relationship between equivalent age strength and mixing strength; and the road and bridge construction quality is improved, and the service life is prolonged.