Passivation liquid supply system for stably supplying liquid after plating of continuous acid plating production line

The utility model discloses a passivation liquid supply system for stably supplying liquid after plating of a continuous acid plating production line, which belongs to the technical field of steel production and comprises a liquid preparation tank, a liquid storage tank, a passivation pump, a passivation spray head, a passivation pool and a transfer tank, the liquid preparation tank is communicated with the liquid storage tank through a pipeline with an electromagnetic valve, the liquid storage tank has a liquid level detection function, and the electromagnetic valve is controlled to be opened and closed through the liquid level; an outlet of the liquid storage tank is sequentially connected with the passivation pump and the transfer tank, an outlet in the bottom of the transfer tank is connected with the main liquid outlet pipe, the main liquid outlet pipe is connected with the two branch liquid outlet pipes through the three-way connector, the upper branch liquid outlet pipe is connected with the passivatio