The invention provides an integral type air-source water heater. The integral type air-source water heater comprises a shell, a main machine part, a water tank part and a bearing partition plate, wherein the main machine part is arranged at the upper part inside the shell; the water tank part is arranged at the lower part inside the shell; the bearing partition plate is arranged between the main machine part and the water tank part and is used for supporting the main machine part; the main machine part comprises a compressor, a four-way valve, an evaporator, a throttling element and a fan; the water tank part comprises an inner container body and a condenser; the top surface of the inner container body is provided with first concave supporting surfaces; the bearing partition plate is provided with second concave supporting surfaces; a supporting body is arranged between the first concave supporting surfaces and the second concave supporting surfaces; the supporting body is provided with a first convex supporting surface and a second convex supporting surface, wherein the first convex supporting surface is matched with the first concave supporting surfaces, and the second convex supporting surface is matched with the second concave supporting surfaces; at least two first concave supporting surfaces and at least two second concave supporting surfaces are arranged. The supporting body is used for connecting the inner container body and the bearing partition plate, so the integral type air-source water heater provided by the invention has few parts, is simple to install and is more stable in bearing structure.