Abstract: The moisture migration regularity and the new irrigation method in the sandy soil of river ancient channel were studied. The results indicate that the soil water evaporation capacity in 7 days with different treatments of irrigating water quota is not significantly different. The trial in 7-year pear trees soil indicates that the sufficient irrigation and the reduction of the frequency of irrigation can save water and raise the yield. The soil moisture can not make a breakthrough of the pear tree's major root system scope as the irrigating water quota is 1200m³/hm² and the soil moisture does not suffice the peer when the irrigating water quota is 600m³/hm² and the peer trees are irrigated 6 times in the growing period of the trees. The irrigating water quota of 900m³/hm² and the 4 times irrigation in the growing period of the trees is the suitable method.