The invention discloses a solution back-heating generation and purification system which comprises a liquid storage tank and generation and purification equipment, wherein the liquid storage tank comprises a liquid outlet and a liquid return port. The solution heat regeneration generation and purification system further comprises a first filter and a first filtering pipeline. A first solution inlet, a first solution outlet, a first flushing inlet and a first flushing outlet are formed in the outer wall surface of the first filter. The first solution inlet is connected to the liquid outlet. Thefirst solution outlet is connected to an inlet of the generation and purification equipment. An outlet of the generation and purification equipment is connected to the liquid return port. A solutioncirculation loop is formed by the liquid storage tank, the first filter and the generation and purification equipment. Two ends of the first filtering pipeline are respectively connected to an outletof the generation and purification equipment and the first flushing inlet and are communicated with the generation and purification equipment and the first filter. The purification effect of the solution in the solution circulation loop is achieved without long-term shutdown and disassembly maintenance.