The invention relates to a carbon
fiber bar skeleton of a
composite material in a four-dimensional carbon
fiber bar. The carbon
fiber bar skeleton is characterized in that: four groups of the carbon fiber bar skeletons are arranged and comprises a left group, a right group, a front group and a back group, each group of the carbon fiber skeletons is composed of a plurality of rows, the rows are parallel with each other, each row is composed of a plurality of round carbon fiber bars, the round carbon fiber bars are parallel with each other, all the carbon fiber bars between adjacent groups are mutually perpendicular to each other on a
vertical projection surface, each group of the carbon fiber bars form same included angle with a horizontal plane, the four groups of the carbon fiber bars skeletons lie on a same horizontal plane, row spacing of the four groups of the carbon fiber bars skeletons are all equal to that of the carbon fiber bars in each row, four carbon fiber bars of the four groups of the carbon fiber bars skeletons on a same row is tangent at a point, and the tangent points among the four carbon fiber bars in the same row lie on a same horizontal plane. The advantages reside in that: a unit of the carbon fiber bar is in a rectangular
pyramid shape, a structural body is difficult to be distorted and deformed; incised from whatever the direction is, the carbon fiber bars form a
net shape, accordingly the carbon fiber bars bear uniform force and multidirectionally
resist impact force. Open channels is existed between all the carbon fiber bar skeletons, so has big a space duty ratio, are extended to a CVD process, and make the treatment of the filling very smooth.