The utility model relates to an auxiliary steel bar welding support for burying a soil manometer in a deep and thick silt soil layer, which comprises at least a first steel bar skeleton section for tying a lateral soil manometer and at least a second steel bar skeleton section for tying a vertical manometer, wherein two adjacent ends between each steel bar skeleton section are mutually connected to each other and are fixed by welding; each steel bar skeleton section evenly comprises two parallelly arranged main bars; a plurality of parallelly arranged secondary bars are set between the two main bars; and two ends of the secondary bar are welded orthogonally with the two main bars. According to the utility model, the auxiliary steel bar welding support is used to effectively assist the soil manometer to be buried with accurate positioning and has the advantages of flexible design, convenient construction and low cost; the problem of burying the vertical and lateral manometers in the deep and thick silt soil layer is solved effectively; the construction process is reduced; the construction cost is saved; and the normal work of the soil manometer is ensured.