Portable double folding bicycle

A portable double folding bicycle, comprising a front wheel (4), a frame assembly and a rear wheel (12) connected sequentially, wherein the frame assembly comprises a handlebar (1), a front frame (3), a horizontal crossbar assembly, a rear frame (11) and a saddle (14), the front wheel (4) is connected to the front frame (3), the handlebar (1) is detachably connected to the upper end of the front frame (3), the rear wheel (12) is connected to the rear frame (11), and the horizontal crossbar assembly comprises a front crossbar (5), a middle crossbar (7) and a rear crossbar (9) sequentially connected from front to back, the front end of the front crossbar (5) is fixedly connected to the front frame (3), a rear end of the front crossbar (5) is connected to a front end of the middle crossbar (7) through a first two-way folder (6), a rear end of the middle crossbar (7) is connected to a front end of the rear crossbar (9) through a second two-way folder (8);

• a rear end of the rear crossbar (9) is fixedly connected to the rear frame (11), and the saddle (14) is detachably connected to the rear crossbar (9), with the inclination angle of the first two-way folder (6) in reference to the horizontal crossbar assembly being A, and 58°≤A≤62°;
• the inclination angle of the second two-way folder (8) in reference to the horizontal crossbar assembly being B, and 89°≤B≤94°, wherein after the second two-way folder (8) is folded, the middle crossbar (7) and the rear crossbar (9) are disposed in a side-by-side relationship.