The invention discloses a food dicing machine. The food dicing machine comprises a container, a gridding knife assembly and an upper cover, wherein the gridding knife assembly is installed at an opening of the container, and the upper cover is arranged above the opening of the container. The gridding knife assembly comprises a gridding knife plate and a rotating cutter placed on the gridding knife plate. The middle of the container is provided with a transmission shaft. The transmission shaft upwards and freely penetrates through a center hole of the gridding knife plate to be detachably connected with the rotating cutter. The upper end of the transmission shaft is provided with a transmission head connected with the rotating cutter. The connecting position of the transmission head and the rotating cutter is provided with a buckling structure easy to disassemble and assemble. The buckling structure is further provided with a limiting device in the vertical direction. When the rotating cutter is placed on the transmission head and rotates, a driving buckling part arranged on the rotating cutter and a driven buckling part arranged on the transmission head are buckled with each other, so that the transmission shaft is driven to rotate, and the rotating cutter does not shift up and down during rotating through the limiting device of the buckling structure. According to the food dicing machine, the structure is simple, in addition, the rotating cutter can be restricted from being shifted up and down, installing and operating are convenient and easy, and cleaning is convenient.