Abstract: Abstract: Polyacrylamide (PAM)/montmorillonite (MMT) composite guide water-release coated materials can apply to the desertification control, but there is a problem in the process of materials preparation since concentration ratio is inaccurate caused by gravity and others. Adding dispersants is one of methods to solve the imbalance concentration ratio problem of PAM/MMT composite guide water-release coated materials. This study focused on the properties of water-release coated material after added different dispersants including polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA), sodium dodecyl sulfate (SDS). The mass ratios of PAM and dispersants were 1:0.60 (PVP), 1:0.20(PVA), 1:0.25 (SDS) (mass ratios were based on the pre-experimental study on dispersants for suspension of the compound solution). The film-forming property of fiber bundle and the structure of coating microstructure were analyzed by scanning electron microscopy (SEM). Water absorption and dehydration characteristics of the composite materials were studied by the thermal analyzer and weight analysis. Infrared spectrometer could analyze the chemical composition of the composite materials. The scanning electron microscopy results showed that the composite material (mass ratios of PAM and MMT was 1:10) adding dispersants including PVP, PVA, and SDS, could improve its film-forming property and dispersion property of MMT in the network structure of PAM. The film-forming property was the best after adding PVA, and the dispersion property of MMT in polymer was best after adding the 3 dispersants. Water absorption and dehydration property analysis by thermal analyzer and weight analysis revealed that PAM/MMT/SDS composite material was best, followed by PAM/MMT composite material, then PAM/MMT/PVP composite material and PAM/MMT/PVA composite material. Water absorption rate of PAM/MMT/SDS composite could reach 14 g/g at about 110 min, and its release moisture content could reach 2.08 g/g at about 100 min. The infrared spectrum analysis of composite water-release coated materials showed that the stretching vibration absorption peak wave number of Si-O-Si was 1043.1 cm-1, and stone silica's wave number was 796.9 cm-1. There were not new wave number appeared, and some occurred an offset. No new substances were formed in the composite material after adding dispersants, and MMT particles were attached in the network structure of PAM and dispersants mixture network structure. Comparably, PVA was good at forming and strengthening film, but its water holding capacity was worse; while the SDS was the opposite. PVP was between the 2 dispersants. In practice, it needs to choose dispersants based on the requirements of application. The study provides valuable information for accurate determination of formula in the water-release coated materials preparation.