Provided is an integrated TDS photoelectronic reflective type flowmeter. The flowmeter comprises a fluid cavity, a reflective type impeller assembly, a data collection chamber and a head cover; the fluid cavity is provided with a water inlet and a water outlet, and the center of the bottom of the fluid cavity is provided with a protrusion used for containing the reflective type impeller assembly; the reflective type impeller assembly is composed of multiple blades and a rotating shaft, a reflecting plate is arranged on each blade, the data collection chamber is arranged above the fluid cavity, side sealing is adopted between the data collection chamber and the fluid cavity through an O-shaped ring, a control panel is arranged in the data collection chamber, the head cover is connected with the data collection chamber and the fluid cavity into a whole through screws, a TDS probe is fixed with the data collection chamber in an injection molding mode, one end of the probe penetrates through the data collection chamber to directly make contact with fluid, and the other end of the probe is tightly combined with a spring needle on the control panel; a microprocessor conducts processing and operation on an original signal collected by a sensor and outputs collected data to the outside. According to the integrated TDS photoelectronic reflective type flowmeter, the metering precision is greatly improved, pollution to the fluid does not exist, and precise detection on photoelectric flow is achieved.