The invention discloses a rotary tilling, ridging, dibbling and watering machine. The rotary tilling, ridging, dibbling and watering machine comprises a frame, a rotary tilling device, a ridging device, a dibbling device, a watering device and wheel device and is characterized in that the frame comprises a front transverse square beam (4), a rear transverse square beam (6) and a longitudinal beam(28); a gearbox (2), a chain box (3) and a rotary tilling drive sprocket (35) connected to the rear lower portion of a rubber-track tractor (1); the rotary tilling device comprises rotary tilling cutters (31), a rotary tilling cutter shaft (33), a rotary tilling transmission sprocket (32) and a rotary tilling transmission chain (34); the rotary tilling cutter shaft (33) is arranged on the front lower portion of the longitudinal beam (28), and N rotary tilling cutters (31) are spirally mounted on the rotary tilling cutter shaft (33). The rotary tilling, ridging, dibbling and watering machine has the advantages that the rotary tilling, ridging, dibbling and watering machine is applicable to the soil drought periods of crops such as corn and peanuts and capable of effectively increasing seedemergence rate, and the work efficiency of the machine can be increased by 80 times as compared with that of manual planting and watering; the machine is high in operation efficiency, good in operation effect, low in production cost, beneficial to crop yield increasing, capable of increasing the income of farmers and the like.