The on-site liquid preparation device comprises a moving trolley, a dissolving tank and a circulating water pump, the dissolving tank and the circulating water pump are arranged on the moving trolley, a feeding port is formed in the top of the dissolving tank, an input port is formed in one end of the dissolving tank, an output port is formed in the other end of the dissolving tank, a sealing cover is detachably installed on the feeding port, and the circulating water pump is arranged on the moving trolley. A liquid inlet
pipe is installed on the input port, a liquid outlet
pipe is installed on the output port, the circulating water pump is installed on the liquid inlet
pipe, and the liquid inlet end of the liquid inlet pipe and the liquid outlet end of the liquid outlet pipe are each provided with a conveying tank connector. The on-site liquid preparation device for
oil well plug removal has the advantages of being scientific in design, easy to operate, high in safety and high in practicability.