The utility model discloses a dish-washing machine which comprises a dish-washing tank which comprises a tank body and a tank bottom, the top of the tank bottom is connected with the bottom of the tank body, and the width of the vertical section of the tank bottom is gradually reduced from the top of the tank bottom to the bottom of the tank bottom. The spray pipe is mounted at the bottom of the tank. According to the dish washing machine, the width of the groove bottom of the dish washing groove is gradually reduced from the top to the bottom of the groove bottom, the spraying pipe is installed at the groove bottom, a dish basket can be effectively avoided when the dish washing machine works, the space utilization rate of the dish washing groove is increased, and the effective containingspace of the whole dish washing groove is increased; the spray pipe is installed on the lower portion of the sink body and can keep enough distance from the bottom of the sink bottom, meanwhile, the overall size of the dish-washing sink is reduced, and the space utilization rate of the installation space where the dish-washing sink is located is increased.