<p>A box body structure of a sink type cleaning machine comprises a box body. The box body comprises a sink body (1). One side wall of the sink body (1) is provided with an overflow apparatus (15). The overflow apparatus (15) comprises an overflow support (151) that is provided with an opening on a side connected to the sink body (1). A through hole corresponding to the opening of the overflow support (151) is arranged on the side wall of the sink body (1). An overflow pipe (155) is arranged below the overflow support (151). The overflow pipe (155) is in fluid communication with the overflow support (151), and the overflow support (151) is in fluid communication with cleaning space. The overflow support is arranged to incline upward towards a direction away from the sink body, ensuring that cleaning water exceeding a required water level is discharged through the overflow pipe, avoiding spraying out from a cover position, and ensuring that a small amount of sprayed water can reenter the sink body.</p>
