Bionic diaphragm breast pump main machine

The utility model relates to a bionic diaphragm breast pump main machine which comprises a machine box (1), a shell (2) is arranged on the machine box (1), an opening is formed in one side of the shell (2), an elastic diaphragm (3) is connected to the opening side in a sealed mode, and a hollow body (7) used for containing a transmission medium (5) is formed by the diaphragm (3) and the shell (2). A driving device (4) arranged in the machine box (1) is connected with the diaphragm (3) to drive the diaphragm (3) to move in a reciprocating mode to change the internal volume of the hollow body (7), and the transmission medium (5) acts on the breast pump to work through a connector (21) which is arranged on the shell (2) and communicated with the breast pumping cover. The diaphragm directly acts on the transmission medium, so that the problem of seepage is effectively solved, the problem of breast pumping pain of the breast pump can be solved according to different transmission media, and the breast pump is high