The invention relates to the technical field of water heaters, in particular to a solar water heater bracket suitable for various roof mounting. The solar water heater bracket comprises a water tank bracket, wherein a detachable and length-adjustable back upright post for supporting the water tank bracket is arranged at one end of the water tank bracket, and by changing the length of the back upright post, the solar water heater bracket can be mounted on roofs with different inclination angles. In the using process of the solar water heater bracket, the back upright post is selectively mounted or detached and the number of upright post units for forming the back upright post is increased, so that the solar water heater bracket is suitable for different roof structures, mounting materials can be made full use, mounting is more convenient and quicker, the modularization degree in the production process is improved, and the production cost is reduced.