The invention discloses farmland-garden water and fertilizer integrated irrigation equipment which comprises an irrigation pipeline, a connection head, a mixing device, a first connection pipe, a first shell, a first motor, a first impeller, a speed reducer, a water inlet pipe, a high-pressure air pipe, a preprocessing tank, a fixed stopping block, a sealing cover, a spring, a quantitative conveying device, a fertilizer storage tank, a water inlet value, a stirring paddle, a base, a second motor, a conveying pipe, a second shell, a second impeller and a second connection pipe. The farmland-garden water and fertilizer integrated irrigation equipment disclosed by the invention has the advantages of reasonable and simple structure, low production cost and convenience in installation. Firstly, the quantitative conveying device can convey a fertilizer stored in the fertilizer storage tank into the preprocessing tank; then the water inlet valve is started to add the defined proportion of water into the preprocessing tank; then compressed air is sent into the preprocessing tank by the high-pressure air pipe; the arranged speed reducer can guarantee that the output proportions of the water and the fertilizer are the same; finally, the water and the fertilizer are further mixed by the mixing device and then conveyed into the irrigation pipeline to irrigate farmland and gardens.