A bendable bottom housing, comprising: a first half housing (101), a second half housing (102), and a bending part (103) used for connecting the first half housing (101) and the second half housing (102). The bending part (103) comprises several connecting plates (104) sequentially attached at the long side thereof. Also, the connecting plates (104) are connected sequentially via corresponding hinge elements (407). The hinge elements (407) correspondingly comprise a fixed plate (301), a fixed shaft (302) provided perpendicular to the surface of the fixed plate (301), and a pin shaft (303). The fixed shaft (302) is fixedly connected to the corresponding connecting plate (104). The pin shaft (303) is rotatably connected to the adjacent connecting plate (104).