[Objective] This paper conducted a quantitative study on the water footprint and irrigation efficiency of green water and blue water in urban agriculture in guiyang city, so as to provide a basis for scientific quantitative evaluation of urban agricultural water use and management monitoring.[Methods] Using field survey data, meteorological data of Guiyang City and agricultural statistical data, based on crop water demand, water footprint method to evaluate agricultural water resources.[Results] ① The extreme value of crop water footprint depends on the extreme value of crop yield per unit area of the sample plot. The green water footprint and blue water footprint were 741.60, 153.48, 424.44 and 87.84 m³/t. ② The green water consumption of different crops in urban agriculture was higher than the blue water consumption. The proportion of green water and blue water ranged from 53.81%(cowpea) to 63.60%(tomato). ③ The three irrigation efficiencies of urban agriculture are 27.23%, 69.45% and 80.32%, respectively. ④ In 2017, the urban agricultural blue water irrigation demand is between 4.81×10⁵ m³ (complete drip irrigation) and 6.93×10⁵ m³(complete ditch irrigation).[Conclusion] In 2017, the total water demand for urban agriculture in Guiyang City was 1.29×10⁶ m³, of which 8.84×10⁵ m³ was green water and 4.02×10⁵ m³ was blue water. The irrigation method has great room to improve the urban agricultural water use in Guiyang City, and the contribution rate of drip irrigation method to the urban agricultural water resource management in Guiyang City is up to 53.09%.