Preparation method of abnormal low pressure vessel reinforcement

The invention relates to a preparation method of abnormal low pressure vessel reinforcement. The preparation method comprises a step of segmented performing, and a step of secondary integral forming; according to the step of segmented performing, the reinforcement is divided into a plurality of segments based on the appearance of the abnormal vessel, and the reinforcement segments are subjected to performing in corresponding performing moulds so as to obtain reinforcement preformed segments; according to the step of secondary integral forming, the reinforcement preformed segments obtained in the step of segmented performing are subjected to slicing, bonding, flattening, and solidification so as to obtain an integral body on the surface of an abnormal vessel inner container. According to the preparation method, segmented performing technology is adopted, the reinforcement integral body difficult for machine moulding is divided into segments convenient for machine moulding, and mechanized batch production is realized; in the process of secondary moulding, a secondary moulding mould and a vessel are used for pressing parts for curing at the same time, so that it is ensured that the obtained long fiber composite material reinforcement possesses no wrinkle or bubble, and force distribution is scientific and reasonable; long fiber strength utilization ratio is high, and raw materials are saved.