The utility model discloses a phytoremediation simulation test system for soil contaminated by PAHs (polycyclic aromatic hydrocarbons). The phytoremediation simulation test system comprises a water supply device, a spray system, a plant treatment tank, a liquid buffer tank and a liquid recycle bottle which are connected in sequence, wherein the water supply device adopts the structure that an inorganic nutrient salt liquid storage bottle and an organic carbon source liquid storage bottle are connected in parallel, and then are connected with a micro-nano-bubble generator and a peristaltic pump in sequence; the spray system is composed of a plurality of spray nozzles and a water supply network which is connected with the spray nozzles; the spray nozzles are arranged in the plant treatment tank; the plant treatment tank is connected with the liquid buffer tank through a porous water distribution partition board; efficient restoration plants are planted in the plant treatment tank; a plurality of chemical adding wells and soil gas monitoring wells are mounted in the plant treatment tank; soil sampling holes are formed in the side wall of the plant treatment tank. The phytoremediation simulation test system is flexible in design, easy and convenient to operate, high in controllability, low in cost, free from secondary pollution and conducive to research and development of strengthening measures for phytoremediation of soil contaminated by PAHs as well as discussion on the mechanism of action, and can be further used for simulating the phytoremediation processes of soil contaminated by other organic matters.