Liquid supply device of crude foil engine

A liquid supply device of a crude foil engine comprises a liquid inlet tank assembly, a plurality of bottom liquid feeding pipes, a plurality of ball valves, a plurality of top liquid feeding pipes and a flow guide box assembly. The upper end of a liquid inlet tank in the liquid inlet tank assembly is communicated with the lower end of each bottom liquid feeding pipe; the upper end of the bottom liquid feeding pipe is communicated with the lower end of the ball valve. The upper end of the ball valve is communicated with the lower end of the top liquid feeding pipe; and the upper end of the top liquid feeding pipe is communicated with a bottom cavity of a flow guide box in the flow guide box assembly. A liquid mixing assembly is arranged in the liquid inlet tank assembly; and a flow guide net plate is arranged in the flow guide box assembly. The uniform distribution degree of the electrolyte is greatly improved through the liquid mixing assembly and the flow guide box assembly, so that it is guaranteed that th