The invention discloses a garden 
greening and 
water saving device which comprises a water inlet 
pipe, a water-saving 
pipe, universal wheels, a water outlet 
pipe, a connecting pipeline and a cooling ventilator. According to the device, a 
sponge block is placed on a movable drawing mechanism arranged in the connecting pipeline and can absorb 
moisture in the soil. When the 
moisture is sufficient, thesponge block absorbs the weight of the 
sponge block to compress downwards a compression spring, so that the tensioned movable drawing mechanism is loosened, a triangle rack horizontally engages and drives leftwards a linkage gear to drive a transition wheel to rotate anticlockwise, one fixed end of a semi-circular 
cam is loosened, the other end of the semi-circular 
cam ejects an irregular 
bevel gear to drive a 
cam transmission mechanism to rotate a 
half cycle anticlockwise, the cam transmission mechanism is engaged with a movable flow guide device, a movable rotating wheel rotates under driving of the movable flow guide device, so that one rotating end of a flow guide pipe ejects upwards a floating ball to communicate with the water inlet pipe to form a 
water flow channel, water is supplied according to requirements, the inside of the device is designed in a 
mechanization manner, the water is reasonably saved, and 
environmental protection property is high.