The invention relates to a compound-
type metal roof thermal-insulation waterproof 
coating and a preparing method thereof. The compound-
type metal roof thermal-insulation waterproof 
coating is composed of a 
surface layer coating and a base layer coating. The 
surface layer coating is prepared from water, dispersing agents, antifoaming agents, 
pigment, hollow glass beads, inorganic-
thixotropy thickening agents, 
inorganic filler, 
silicone-modification acrylic 
emulsion, acrylic 
emulsion, film forming assistants, pH value regulation agents, thickening agents and 
antifreeze agents; the base layer coating is prepared from water, dispersing agents, antifoaming agents, 
pigment, heat-conducting functional filler, inorganic-
thixotropy thickening agents, 
inorganic filler, acrylic 
emulsion, pH value regulation agents, thickening agents and 
antifreeze agents. Compared with the prior art, the problems that bonding of a present waterproof material and a 
metal base material is not firm, aging is prone to occurrence and the service life is limited are solved, and the compound-
type metal roof thermal-insulation waterproof coating has the 
advantage of integrating water proofing, protection, 
rust protection and 
thermal insulation.