The invention discloses a pressure transmitter device for preventing deposition in a test conduit. The pressure transmitter device includes a lower end cover, a filter net, and a pressure transmitter. The filter net is installed at the inlet of a measurement conduit of the pressure transmitter. The right end of the lower end cover is hinged to the left end of the inlet of the measurement conduit. The measurement conduit has a vertical through hole in the right wall. A mobile piston is arranged in the through hole. The lower end of an operation rod is connected with the upper end of the mobile piston. The upper end of the operation rod extends to the outside of the measurement conduit. One end of a traction rope is connected with the lower end of the mobile piston, and the other end of the traction rope extends to the outside of the through hole and is connected with the left end of the lower end cover. The size of the lower end cover matches that of the filter net. Steel nails corresponding to the meshes of the filter net are vertically fixed on the upper surface of the lower end cover, and the meshes and the steel nails have a one-to-one correspondence relationship. The filter net prevents dreg from entering the test conduit, and prevents deposition inside the test conduit. Moreover, deposition on the filter net can be removed, and the accuracy of long-term measurement can be ensured.