Electric spindle and numerical control machine tool

The invention provides an electric spindle and a numerical control machine tool, and belongs to the technical field of electric spindles. Comprising a shaft sleeve, an adapter water jacket, a rear end seat and a pipeline disc, the shaft sleeve is provided with a plurality of shaft sleeve cooling flow channels, the multiple shaft sleeve cooling flow channels are matched with the adapter water jacket at one end of the adapter water jacket, and the multiple shaft sleeve cooling flow channels are matched with the rear end seat at one end of the rear end seat. And the plurality of shaft sleeve cooling flow channels are matched with the adapter water jacket and the rear end seat to form a circulating cooling flow path. According to the electric spindle, the shaft sleeve cooling flow channel is formed in the shaft sleeve of the electric spindle, circulating flow of cooling liquid in the shaft sleeve cooling flow channel in the shaft sleeve can be achieved through cooperation of the shaft sleeve, the adapter water ja