Bed frame of iron frame bed

A bed frame of an iron frame bed, comprising:

• two transverse rods symmetrically parallel to each other in a front-and-rear direction,
• two longitudinal rods symmetrically parallel to each other in a left-and-right direction,
• two or three longitudinal beams connected to the two transverse rods,
• four upright columns arranged vertically, and
• a plurality of frame rods, wherein:
• the two longitudinal rods and the two transverse rods form a rectangular frame,
• the four upright columns are respectively connected to four corners of the rectangular frame,
• a length of each of the two transverse rods is greater than a length of each of the two longitudinal rods,
• the two or three longitudinal beams divide the rectangular frame into three or four individual cells,
• the plurality of frame rods are evenly disposed in the three or four individual cells,
• the plurality of frame rods are arranged transversely,
• a length of each of the plurality of frame rods is shorter than a length of each of the two or three longitudinal beams, and
• each end of each of the plurality of frame rods is connected to one of the two longitudinal rods or one of the two or three longitudinal beams.