Automobile B column reinforcer structure

The invention relates to an automobile B-pillar reinforcer structure which comprises a B-pillar upper reinforcer, a B-pillar lower reinforcer and a B-pillar reinforcer supporting piece. A block line A of the B-pillar upper reinforcer and the B-pillar lower reinforcer is formed by connecting a first inclined section, a first vertical section, a second inclined section, a first straight section, a second vertical section and a second straight section; the first inclined section, the first vertical section, the second vertical section and the second straight section on the lower side of the B-pillar upper reinforcing part are connected with the upper side of the B-pillar lower reinforcing part into a whole through welding; the B column upper reinforcer is thermally formed by a steel plate with the tensile strength larger than or equal to 1400 MPa and the material thickness of 1.4 mm; the B column lower reinforcer is made of a steel plate with the tensile strength larger than or equal to 340 MPa and the material