A bridge type weighing sensor comprises a bearing plate, a vertical space limiting part, a bearing pressure head, a horizontal space limiting jack-up structure, a pedestal, a sensor, a lead wire joint, a lead wire and a vertical space limiting jack-up structure. The left side of the bottom portion of the bearing plate is connected to the vertical space limiting part. The vertical space limiting part is connected to the vertical space limiting jack-up structure. The vertical space limiting jack-up structure is fixedly connected to the pedestal. The bearing pressure head is positioned below the bearing plate and the on right side of the vertical space limiting part. The bearing pressure head is connected to the horizontal space limiting jack-up structure and fixedly connected on the pedestal. The sensor is connected to the horizontal space limiting jack-up structure and fixedly connected on the pedestal. The lead wire joint is fixedly connected to the right side of the sensor. The lead wire joint is connected to a lead wire. A shockproof rubber gasket a and a shockproof rubber gasket b are arranged below the pedestal. The lead wire is provided with a protective casing pipe. The pedestal is provided with a crash pad to reduce measurement errors caused by shock impact, etc. The lead wire is provided with the protective casing pipe so as to preventing the lead wire from being contaminated, corroded and damaged so as to prolong the usage life of the product.