Alkali-free liquid setting accelerator formula for sprayed concrete and making process

The invention discloses an alkali-free liquid setting accelerator formula for sprayed concrete and a making process. The process includes the steps that 30%-50% of sulfate, 2%-10% of aluminum salt and40%-60% of water are added into a stirrer four-mouth flask with temperature control, heating is performed under stirring until the temperature reaches 75-85 DEG C, and heat preservation is performeduntil the raw materials are completely dissolved; a mixed solution obtained after dissolving is filtered through a first filter screen, the mixed solution in the first step is cooled to 40 DEG C, then, 0.2%-0.3% of alcohol amine polymer and 0.1%-0.2% of amide polymer are added for a reaction of 2 hours, then, 0.1%-0.2% of hydroxyethyl cellulose is added for a reaction of 30 minutes, water is addedfor regulation until the concentration reaches 40%, cooling is performed to obtain a colorless transparent liquid setting accelerator, and the colorless transparent liquid setting accelerator is filtered through a second filter screen. The alkali-free liquid setting accelerator hardly causes corrosive damage to the human body, has high early strength and later compressive strength rate and has noadverse effect on the durability of concrete, and a tackifying component can reduce the dust concentration and springback in the spraying process.