The invention discloses a medium-high-temperature through 
type metal solar collector tube which comprises a 
metal parent tube, the outer surface of the 
metal parent tube is covered with an anti-
corrosion coating and an absorption 
coating in sequence from inside to outside, wherein the anti-
corrosion coating is a high phosphorous chemical 
nickel-plated coating, the thickness of the high phosphorous chemical 
nickel-plated coating is 10 to 20 Mum, and the absorption coating comprises a 
metal infrared reflecting sub-coating, a metal 
ceramic medium-high-temperature heat absorbing sub-coating and areflection reducing sub-coating in sequence from inside to outside. The medium-high-temperature through 
type metal solar collector tube disclosed by the invention solves the problems of 
corrosion of materials at a medium-high temperature of 200 to 500 DEG C, and 
heat resistance and 
oxidation resistance of the heat absorbing coating, realizes corrosion, heat and 
high pressure resistance, and has low cost, a simple preparation process and high practicality.