The invention belongs to the field of transportation, and relates to a mine dumper platform comprising a frame structure formed by a left support, a right support, a front supporting beam and a rear supporting beam which are connected fixedly. The front supporting beam is formed through connections of three-segment beams. A driving cab mounting platform and at least one main bearing beam are arranged in the middle of a platform body, and a fixed supporting seat is arranged at the bottom surface of the connection driving cab mounting platform and the main bearing beam. The platform adopts a large amount of profiles to form an integral frame structure instead of a traditional reinforcing rib structure, the entire strength and rigidity of the frame structure are high, structure is simplified, the manufacture process is simple, welding stress is low, deformation is small, and service life is long; the middle beam portion of the front supporting beam formed through the three-segment beams can be detached independently without disassembling the platform assembly, maintenance and replacement of other parts of a mining car can be facilitated greatly, and the accessibility is high.