▎ 摘　　要

NOVELTY - Anti-hard water lubricant comprises graphene oxide and polyether with a mass ratio of 0.2-0.5:100. USE - Anti-hard water lubricant used for hydraulic support concentrate (claimed). ADVANTAGE - The anti-hard water lubricant reduces the cost of the coal mining process and the difficulty of operation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are including for the following: 1. a preparation method of anti-hard water lubricant, which involves dissolving graphene oxide in N,N-dimethylformamide, adding thionyl chloride and heating to react, where the mass volume ratio of described graphene oxide and thionyl chloride is 0.5-1.0:85-100, and obtaining the unit of mass is gram, and the unit of volume is milliliter, and the graphene oxide of activation after reaction finishes, adding the activated graphene oxide to N,N-dimethylformamide, dispersing, adding triethanolamine, where the mass ratio of activated graphene oxide and triethanolamine is 0.008-0.016:40-60, mixing uniformly, reacting at 95-105degrees Celsius for 3.5-4.5 hours, heating up to 125-135degrees Celsius, adding polyether, and reacting for 2-3 hours to obtain the anti-hard water lubricant; and 2. a hydraulic support concentrate comprises 15-25 pts. wt. anti-hard water lubricant, 15-35 pts. wt. anti-hard water rust inhibitor, 0.1-0.5 pts. wt. benzotriazole, and anti-hard water rust inhibitor of ethylene glycol is a neutralization product of alcohol amine and tricarboxylic acid.