In this paper, non-aqueous liquid guar concentrated suspensions (NALGCS) were prepared by mixing hydroxypropyl guar gum, polyethylene glycol and suspending agent. Apparent viscosities, suspension ratio and hydration rates of the NALGCS were evaluated and influencing factors of quick hydration of the NALGCS were further discussed. Results of rheological experiments and settlement observations showed that quaternary ammonium salt modified montmorillonite was suitable as a suspending agent of the NALGCS. With the increase of the suspending agent content, apparent viscosities of the NALGCS slightly increased, and suspension ratio sharply increased. The apparent viscosity of the NALGCS with 5% of the suspending agent was about 650 mPa·s at shear rate of 340 s-1, the suspension ratio was approximate 100% within 1 d and above 98% within 2 d. Apparent viscosities of the NALGCS with powder liquid ratio (mass ratio of guar gum to polyethylene glycol) of 1:5—1:2 was 200—700 mPa·s at shear rate of 340 s-1, indicating that the NALGCS possessed good flowability, moreover, it was beneficial to pump guar concentrated suspensions into continuous mixing vehicles. Results of hydration experiments showed that a quicker hydration rate of fracturing base fluid prepared using the NALGCS was found under the condition of weak acid, comparing with under the condition of neutral environment, however, the NALGCS could not hydrate under alkaline condition. The pH value of the dosed water was 5, the 85%-90% of maximum viscosity of the base fluids was achieved within 3—5min. Higher shear rate would also accelerate hydration of guar concentrated suspension.