The invention provides an electronic type pressure sensor half die flanging and riveting fixture. A product is placed into a product positioning fixture and located in a die assembly fixture. A hydraulic machine is started. Motion cylinders move downwards. Wedge blocks apply opposite thrust to the die assembly fixture, so that the die assembly fixture conducts clamping and automatic die assembly,and the product is clamped in the die assembly fixture. An upper die fixture presses down and conducts flanging and riveting on the product through a rounded angle and three protrusions to complete one-time molding. Compared with the prior art, the electronic type pressure sensor half die flanging and riveting fixture can improve the production efficiency and guarantee the flanging and riveting molding process of the product and can also reduce the labor cost.