Cleaning device of precise spaceflight device

The invention discloses a cleaning device of a precise spaceflight device. The cleaning device comprises a support rod and a cleaning part, wherein the support rod is a bar part; the cleaning part consists of an inner-layer structure and an outer-layer structure, and is mounted on the support rod in a manner of wrapping one end of the support rod through the inner-layer structure; the inner-layer structure is made of hydrophobic phenolic foams; the outer-layer structure is made of hydrophilic polyurethane foams; and the outer-layer structure and the inner-layer structure are bonded through epoxy resins. The cleaning device is suitable for cleaning the precise spaceflight device, in particular precise pipe fittings with small inner diameters. The hydrophobic phenolic foams have better physical strength and tensile strength, and can provide support; the hydrophilic polyurethane foams have excellent hydrophilia, and can fully absorb cleaning fluid; when the hydrophilic polyurethane foams enter the pipe fittings, the inner walls of the pipe fittings can be fully contacted with the cleaning fluid so as to totally clean the inner walls of the pipe fittings; and in addition, the hydrophilic polyurethane foams cannot scratch the inner walls of the pipe fittings.