The invention relates to a waste water reclamation device of a water purification machine, which comprises a water purification machine, a water purification machine inlet pipe and a water purification machine outlet pipe, wherein one end of the water purification machine inlet pipe is communicated with external water, the other end of the water purification machine inlet pipe is communicated with the water inlet of the water purification machine, one end of the water purification machine outlet pipe is communicated with a waste water outlet of the water purification machine. The waste water reclamation device also comprises a water utilization pipeline, an electromagnetic valve, a water storage tank, a liquid level switch, an one-way valve and a water feed pipe, wherein one end of the water utilization pipeline is communicated with external water, the other end of the water utilization pipeline is an outlet end for use, and the electromagnetic valve for switching water flow is arranged in the water utilization pipeline; and the other end of the water purification machine outlet pipe is connected to the water storage tank, the liquid level switch for switching the electromagnetic valve is arranged in the water storage tank, and the water feed pipe is connected to the water utilization pipeline between the outlet end and the electromagnetic valve through the one-way valve whichis downward conductive from top to bottom. By using the structure, the invention solves the conflict that the reclaimed waste water is wasted.