The invention discloses a circular knitting method of a
composite material high-pressure container. The circular knitting method comprises the following steps that firstly, the ends of warp yarns are uniformly distributed at the root of an end socket at one end of a core mold, and the warp yarns are tightened by using a ribbon; then circular knitting is started; then a shedding mechanism starts to normally move along with rotation of a main shaft of a circular knitting
machine, meanwhile, the core mold moves reversely, circulation is conducted till the thickness of a fabric meets the requirement, and circular knitting is completed; and glue dripping, pressurizing, heating and curing are conducted on the structure subjected to circular knitting, and the
composite material high-pressure container is obtained. The circular knitting
machine is adopted for knitting the
composite material high-pressure container, the spiral angles of all warp yarns flatly laid on the cylindrical surface relative to the axis of the core mold are the same, the spiral directions of the warp yarns of adjacent
layers relative to the axis of the core mold are opposite, therefore,
fiber cross bending caused by mutual overlapping does not exist between adjacent flatly laid warp
yarn layers, and the
mechanical property of high-strength fibers can be better exerted. The circular knitting method not only can be used for knitting a
solid propellant rocket engine
combustion chamber shell, but also can be used for producing composite material wings, large fan blades, telegraph poles and large high-pressure pipelines.