The invention relates to a two-cavity replaceable environment-friendly filter. The two-cavity replaceable environment-friendly filter comprises a fine filter, a rough filter and a connecting body, wherein the fine filter and the rough filter are arranged in the up-and-down direction, and the connecting body is located between the fine filter and the rough filter and connects the fine filter with the rough filter. The connecting body is provided with an oil inlet and an oil outlet. The oil inlet is connected with the rough filter, and the fine filter is connected with the oil outlet through a second channel in the connecting body. A first channel and a third channel communicating with the fine filter and the rough filter are further arranged in the connecting body. It can be known from the above technical scheme that the fine filter and the rough filter are arranged at the upper position and the lower position of the connecting body, so that the product structure is more compact; meanwhile, use of connectors and connecting pipelines is reduced, use of materials is also reduced, the leakage risk is lowered, and the production efficiency is improved; and an environment-friendly material which can be cyclically used is selected for a filtering tank, so that harm to the environment is reduced; and due to the design of a replaceable filtering element, waste of a shell is reduced, and the final use maintenance cost is reduced.