The invention discloses a two-line parallel type electronic water gauge circuit. The circuit is composed of multiple stages of water level detection sub-circuits which are arranged in parallel at equal intervals, a voltage division circuit, a microprocessor and the like. The water level detection sub-circuit is composed of an NMOS tube, a resistor, a detection electrode and a common electrode. Whether a water body makes contact with a detection electrode or not is used for deciding connection and disconnection of an NMOS tube, then whether a low-impedance path is provided for detection signaltransmission or not is determined, multi-stage parallel convergence transmission is conducted, finally, a microprocessor MCU conducts analog-digital conversion through AD to obtain a voltage value, the voltage value is compared with reference voltage, and water level information is obtained. A two-wire system replaces a previous four-wire system, analog signals replace digital signals, the flexible electronic water gauge has the advantages of being large in measuring range, capable of being cut at will, ultralow in power consumption, wide in working voltage and temperature range, light in weight, small in size, high in response speed, high in interference resistance, high in corrosion resistance and the like, the waterproof level can reach IP68, and the flexible electronic water gauge is further machined.