PBL stiffening rectangular steel tube concrete space truss

The invention discloses a PBL stiffening rectangular steel tube concrete space truss. The concrete space truss comprises a top bracing and a bottom bracing arranged just below the top bracing, wherein the top bracing and the bottom bracing are distributed in parallel; the top bracing comprises a plurality of top chords and a plurality of upper connection rods connected with each two adjacent top chords; the bottom bracing comprises a plurality of bottom chords and a plurality of lower connection rods connected with each two adjacent bottom chords; the plurality of top chords and the plurality of bottom chords are distributed in a staggered manner; each bottom chord is fixedly connected with two top chords at the left side and the right side above through a plurality of web members; the plurality of top chords and the plurality of bottom chords are PBL stiffening chords; each PBL stiffening chord comprises a square steel tube I, four PBL stiffening plates and an inner-pipe concrete structure. The concrete space truss is simple in structure, convenient to process, fabricate and construct and excellent in structural mechanical property, and has a good using effect, and a plurality of problems of an existing truss structure can be effectively solved.