Liquid flow meter for detecting flow of tiny liquid

The invention discloses a liquid flow meter for detecting the flow of tiny liquid, and relates to the technical field of liquid flow meters, the liquid flow meter comprises a conical pipe body, an upper conical groove and a lower conical groove are formed in the conical pipe body, a floater is arranged in the conical groove formed in the conical pipe body, a filter shell is arranged at the lower end of the conical pipe body, and a through hole is formed in the conical pipe body; the filter comprises a conical pipe body, a fixed channel block is fixedly mounted on the conical pipe body, a wedging blocking block is slidably mounted in the fixed channel block, a second mounting baffle is slidably mounted in the fixed channel block in a penetrating mode, and a connecting rod is fixedly mounted at the side end of the second mounting baffle. By means of the conical pipe body and the filtering structure in the conical pipe body, particle impurities can be effectively prevented from entering the conical pipe body whe