Portable automatic water quality detector

The invention relates to a portable automatic water quality detector. A portable automatic water quality detector comprises a detector body and a water sample detection card box, the detector body comprises a photoelectric detection module, a light source, a detection slot, a display and a control circuit module, the water sample detection card box is detachably inserted in the detection slot, and the water sample detection card box comprises a water sample bin, a preloaded reagent bin and a water sample filling port. An inner side filling hole is formed in the inner side end of the reagent preloading bin, an outer side opening is formed in the outer side end of the reagent preloading bin, and a piston piece capable of moving in the direction from the outer side opening to the inner side filling hole is arranged in the reagent preloading bin. Compared with the prior art, the device is easy to operate and convenient to carry; after an operator inserts and installs the water sample detection card box filled wit