Bridge prefabricated part production process

The invention relates to the field of prefabricated parts, in particular to a production process of a bridge prefabricated part. The technical problems that in the pouring process, gas in concrete and generated heat cannot be discharged in time, the concrete forming quality can be influenced due to the fact that accumulated heat is too high, the concrete can fall on the surface of a steel bar needing to be welded, welding is influenced, and all parts of a prefabricated part are difficult to maintain in the maintaining process are solved. According to the technical scheme, a lifting frame, a bottom die, a side die and the like are included in the bridge prefabricated part production process; a bottom die is placed below the lifting frame; the bottom die is provided with two side dies. During pouring and vibrating, internal gas can be exhausted in time, meanwhile, the temperature of internal concrete can be kept stable, the situation that the temperature is too high, and the concrete forming quality is affected