Dual-mode cooling liquid filtering device for pure electric bus

The invention aims to provide a cooling liquid filtering device which is simple in structure, good in sealing performance, convenient to observe the filtering state of cooling liquid, capable of timely finding the pipeline blockage problem, safe, reliable, simple to operate, low in maintenance cost, easy and fast to disassemble and wash the filter element, and capable of manually adjusting and changing channels. The cooling liquid is enabled to be in a filtering mode or a non-filtering mode through the dual-mode filtering device for the cooling liquid of the pure electric bus. A water inlet and a water outlet are formed in the two ends of the base, an inner cover and an outer cover are arranged at the upper end of the base, a circulation opening matched with an opening in the top of the filter element is formed in the top wall of the inner cover, a screwing clamping groove used for installing the filter element is formed in the lower end of the circulation opening, and the outer cover is detachably fixed to t