Unpowered liquid pumping device

The utility model provides an unpowered liquid pumping device which comprises liquid making tanks, a liquid pumping pipe is arranged in each liquid making tank, each liquid pumping pipe is correspondingly communicated with a water injection pipe located outside the corresponding liquid making tank, the liquid pumping pipes and the water injection pipes form an inverted U-shaped pipe, a water injection valve is arranged at the top end of at least one water injection pipe, and all the water injection pipes are communicated with a main pipe which leads to a liquid collecting area. According to the utility model, the siphon principle and the gravity difference are utilized; sponge copper precipitated in the liquid making tank is left in the liquid making tank, and a solution above the sponge copper is pumped into the collecting pit by the unpowered liquid pumping device, so that slag-liquid separation of the sponge copper and the solution is realized, the nickel content in the sponge copper is reduced, the workin