The invention belongs to the technical field of irrigation, and particularly relates to a photovoltaic water supply system for a novel irrigation emitter of a novel non-pressure irrigation device. Photovoltaic lifting water enters an impounding reservoir, the upper part of the impounding reservoir is provided with an overflow pipe, a water inlet pipe from the impounding reservoir is connected with a horizontal end opening of a tee in a water supply level control pool, an upper end opening of the tee is connected with a square plug through an upper connecting pipe and an internal threaded connector, a lower end opening of the tee is connected with a water distribution pipe through a lower connecting pipe and a ball valve, the right end and left end of an upper connecting rod respectively sleeve an upper right shaft on the upper connecting pipe and an upper left shaft on a sleeve after are trepanned, the right end of a lower connecting rod is fixed on a valve rod, the left end of the lower connecting rod sleeves a lower left shaft on the sleeve after is trepanned, the distance between the upper right shaft and the upper left shaft is equal to the distance between the valve rod to the lower left shaft, the distance between the upper right shaft and the valve rod is equal to the distance between the upper left shaft and the lower left shaft, a buoyancy tank connecting rod is arranged in the sleeve, the upper part of the buoyancy tank connecting rod is provided with a water level control gauge, and the upper part of the sleeve is provided with a water level control locating pin. The photovoltaic water supply system is firm and durable, and water level can be controlled and adjusted conveniently.