NOVELTY - A solar collector roof comprises structure layer (1), insulation layer (2), flexible crack resistant waterproof layer (3), solar reflector layer (4), heat collecting tube carrier (5), heat collecting tube (6), water inflow tube (7) and water outflow tube (8). The structure layer, insulation layer, flexible crack resistant waterproof layer and solar reflector layer are distributed from bottom to top. The structure layer is provided under insulation layer, and the flexible crack resistant waterproof layer is provided above insulation layer.    USE - A solar collector roof.    ADVANTAGE - The solar collector roof integrates the performances of solar collection, insulation and water proofing, and is convenient for maintenance.    DETAILED DESCRIPTION - A solar collector roof comprises structure layer (1), insulation layer (2), flexible crack resistant waterproof layer (3), solar reflector layer (4), heat collecting tube carrier (5), heat collecting tube (6), water inflow tube (7) and water outflow tube (8). The structure layer, insulation layer, flexible crack resistant waterproof layer and solar reflector layer are distributed from bottom to top. The structure layer is provided under insulation layer, and the flexible crack resistant waterproof layer is provided above insulation layer. The solar reflector layer is coated on flexible crack resistant waterproof layer. The heat collecting tube is located above solar reflector layer. A water inlet is provided at one end of heat collecting tube, and is connected with water inflow tube. A water outlet is provided at the other end of heat collecting tube, and is connected with water outflow tube. The heat collecting tube is fixedly connected with heat collecting tube carrier. The structure layer with thickness of 0.4-2 cm comprises cement mortar having high permeability resistance and high strength. The cement mortar comprises cement at class 42.5 in strength, 40-140 meshes fine sand, aluminum silicon vitreous body, water reducing agent, shrinkage reducing agent and water at mass ratio of 450-700:800-1000:100-200:0.3-0.5:0.2-1:180-340. The insulation layer having density of 20-50 kg/m3 and thickness of 5-10 cm, comprises expanded or extruded polystyrene plate. The flexible crack resistant waterproof layer having thickness of 2-3 mm, comprises polymer-cement mortar. The polymer-cement mortar comprises polymer latex or powder, cement, sand and water at mass ratio of 0.001-0.1:1-1.5:1.5-2.5:1. The solar reflector layer comprises solar reflective coating, and has thickness of 0.1-0.2 mm.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a solar collector roof.    Structure layer (1)    Insulation layer (2)    Flexible crack resistant waterproof layer (3)    Solar reflector layer (4)    Heat collecting tube carrier (5)    Heat collecting tube (6)    Water inflow tube (7)    Water outflow tube (8)