The invention provides a combined energy-saving shaft bracket device which comprises a flow guide pipe, three shaft brackets and a shaft sleeve. Two holes are formed at the upper end of the flow guide pipe. A mounting hole is formed at the bottom end of the flow guide pipe. The lower ends of the first shaft bracket and the second shaft bracket penetrates the two holes at the upper end of the flow guide pipe and fixed with the shaft sleeve. The upper ends of the first shaft bracket and the second shaft bracket are fixedly mounted at the bottom of a ship body. The upper end of the third shaft bracket is fixedly connected with the shaft sleeve, and the lower end thereof is embedded into the mounting hole at the bottom end of the flow guide pipe. The shaft sleeve sleeves a propeller shaft and is located in front of a propeller. The combined energy-saving shaft bracket device has the advantages that on the premise that the propelling performance of a conventional propeller is guaranteed, the combination of the flow guide pipe and the shaft brackets with wing-shaped sections is mounted in front of the propeller, the inflow of the propeller is improved, and the propelling efficiency of the propeller under the same working condition is increased.