Abstract: Abstract: It is important to explore the effect of different root micro emitters on soil water distribution, which improves the efficiency of root micro irrigation system. The influence of micro emitter type on soil water distribution was studied in this paper. Two different irrigation systems (surface drip irrigation and root micro irrigation), two different irrigation emitter types (flow adjustable irrigation emitter and drip irrigation belt embedded with inner patch) and three different irrigation times (5, 15 and 30 minutes) were applied on the Yunnan red loam and the yellow sand soils. Soil moisture was determined. The results showed that there was a very significant interaction between the emitter type and the soil type, the emitter type and the irrigation time (P＜0.01), but there was no significant interaction between the three (P> 0.05). The flow adjustable irrigation emitter has 8 horizontal drainage holes. The horizontal width of the irrigation water in the 2 soils was both wide (about 25 cm). The drip irrigation belt embedded with inner patch has a downward single hole. The horizontal width of the irrigation water in the 2 soils was both narrow (about 16 cm). Therefore, for the wide root extension of crops, the application of the flow adjustable irrigation emitter should be more suitable, on the contrary, the drip irrigation belt embedded with inner patch are used instead. In the Yunnan red loam, the areas with higher water content for the root micro-irrigation using belt embedded with inner patch were more close to those of crop roots, the areas with higher water content for the surface drip irrigation basically concentrated on the upper part of the soil of the flower pot. Therefore, compared to the surface drip irrigation, water loss due to evaporation in root irrigation greatly reduced. In the Yunnan red loam, the matric potential to the movement of irrigation water played the main role and water was easy to sink; In yellow sand soil, the gravitational potential to the movement of irrigation water played a main role which could cause the deep percolation of water. In the Yunnan red loam, the soil moisture areas corresponding to 70% of the total area mostly had the narrow and low water content when the irrigation time was short. And each section was continuous. The range of the soil moisture section corresponding to 70% of the total area was the widest in the 3 irrigation times. And the uniformity of soil water distribution was also the highest; in the yellow sand soil, with the increase of irrigation time, the range of the soil moisture content section corresponding to 70% of the total area was larger than that in Yunnan red loam. This showed that sections with low and high soil moisture content were in the majority with uneven distribution in Yunnan red loam. And the sections with middle soil moisture content were in the majority with even distribution in yellow sand soil. This paper provides valuble information for increasing water use efficiency in the roots of micro-irrigation system.