The utility model relates to the technical field of dishwashers, in particular to a door opening structure of a dishwasher. Provided is a door opening device of a dish-washing machine. The refrigerator comprises an inner container assembly and a shell. a guide rail is arranged in the shell; the inner container assembly is arranged on the guide rail. The device comprises a three-stage driving device, the first stage is a door opening driving device, so that the inner container assembly starts to move, under the action of a swing block driving mechanism, the inner container assembly can continueto move forwards and trigger a springback mechanism in the guide rail assembly, and finally, under the action of the springback mechanism, the inner container assembly reaches an expected position, namely, the dish washing machine achieves automatic door opening. The door opening driving device, the swing block driving mechanism and the guide rail springback mechanism enable the inner container assembly to move continuously, and the automatic door opening function of the dish-washing machine is achieved together.