This topic studies the quality supervision of bridge superstructure construction. The pouring and curing of prestressed concrete shall meet the following requirements: 1) When pouring concrete, the positions of anchor plug, anchor ring and backing plate shall be kept stable; 2) Before concrete pouring and prestressing tendon tensioning, all bearing surfaces (such as pads) of anchorage shall be cleaned; 3) Concrete that has been mixed for more than 45min minutes shall not be used; ) Simply supported beam concrete should be layered horizontally and poured at one time. Box girder concrete should be poured at one time as far as possible. When the main girder is high, if it is poured in two or three times, the first pouring should be done 30cm above the top surface of the bottom plate, and then pouring should be done in the order of web plate, top plate and wing plate. 5) In order to avoid channel deformation, the vibrator is not allowed to contact the casing; 6) In order to ensure the compactness of concrete, external vibrator should be used to strengthen the vibration of the end of beam hollow slab and the staggered fixed area of prefabricated members, and the aggregate particle size should not exceed half of the distance between two steel bars or embedded parts; 7) When the concrete cube strength does not reach 15~20MPa, the formwork shall not be removed; 8) When curing concrete, the reserved channels of prestressed steel beams shall be protected. It is forbidden to pour water and other substances into channels, and prevent metal pipes from rusting.