Abdominal puncture device with improved seal assembly

The invention discloses an abdominal puncture device with an improved seal assembly, and belongs to the field of medical apparatus. According to the abdominal puncture device, the gradient of the valve wall of a choke valve decreases gradually from the central opening of the valve wall to the periphery of the valve wall, a sealing lip at the central opening of the valve wall is of a trumpet-type everted structure, and a plurality of small convex bars are uniformly distributed on the trumpet-type everted structure of the sealing lip; a fetch valve includes three valve clacks, each valve clack includes a side valve wall and a bottom valve wall, the side valve walls of the three valve clacks are connected to be a whole, a valve opening is formed in the bottom valve wall of each valve clack, the outer side of each valve clack is provided with an outer wall reinforcing bar extending from the corresponding bottom valve wall to the outer edge of the corresponding side valve wall, and the inner side of each valve cla