Air duct type static electricity eliminating structure and coffee grinding all-in-one machine

The utility model discloses an air duct type static electricity eliminating structure and a coffee grinding all-in-one machine. The air duct type static electricity eliminating structure comprises a bean bin, a grinding bin and a positive and negative ion wind generating assembly. Coffee beans are put into the bean bin; the grinding bin is communicated with the bean bin, and coffee beans are ground in the grinding bin; the positive and negative ion wind generating assembly is arranged on one side of the bean bin, and positive and negative ions generated by the positive and negative ion wind generating assembly sequentially pass through the bean bin and the grinding bin; positive and negative ions generated by the positive and negative ion wind generation assembly firstly contact with coffee beans to eliminate static electricity on the coffee beans after entering the bean bin, and meanwhile, the positive and negative ions can reach the grinding bin along gaps of the coffee beans to contact with coffee powder g