The invention provides a cation fenugreek-
humic acid sand curing agent which is prepared by
coating humic acid by hydrophobic association cation fenugreek, specifically, by taking cation fenugreek anda hydrophobing agent as reaction monomers, dissolving into a
solvent, carrying out a
grafting reaction under the action of an alkali catalyst, synthesizing a hydrophobing association cation fenugreeksolution, putting a humate solution into the hydrophobing association cation fenugreek, carrying out a reaction so as to obtain a
coating,
drying, and crushing, thereby obtaining the sand curing agent, wherein the hydrophobing agent is a long-chain
organic matter which can be reacted with hydroxyl under an alkali condition. Due to an electrostatic function of cation of the sand curing agent and anion on the surfaces of sand grains, the purpose of fixing sand is achieved; the cation fenugreek has certain hydrophilicity and
water retention properties, in addition, the
humic acid self is rich inhydrophilic functional groups, and thus the sand curing agent has a
water retention property; in addition, the humic acid self can be used as a
soil conditioning agent, is capable of improving
fertility of soil and thus is applicable to sand curing application.