The invention discloses an L-shaped chlorine spraying absorber of an acid etching liquid recycling system. The L-shaped chlorine spraying absorber comprises a nozzle, an L-shaped feeding pipe, a one-way air inlet valve, a gas mixing pipe, a diffusion pipe and an auxiliary gas mixing device, the nozzle is fixedly arranged at one end of the L-shaped feeding pipe through a flange, and the one-way airinlet valve penetrates through and is fixed in the outer side of the L-shaped feeding pipe, the gas mixing pipe is fixedly arranged at one end, far away from the nozzle, of the L-shaped feeding pipe,and one end,far away from the l-shaped feeding pipe, of the gas mixing pipe is fixedly connected with the diffusion pipe. According to the L-shaped chlorine spraying absorber of the acid etching liquid recycling system, the L-shaped chlorine spraying and absorbing device is arranged, the chlorine can be efficiently absorbed and be mixed to recycle at the same time, the efficiency of chlorine recycle in the acid etching liquid recycling system is greatly improved., and meanwhile, the secondary utilization capability is improved; and the waste of the chlorine resources is avoided by direct secondary utilization.