The utility model discloses a limiting device of rear connecting rod hinge shafts of hydraulic support bases for a coal mine. A hydraulic support comprises the hydraulic support bases and the two rear connecting rod hinge shafts, and the rear connecting rod hinge shafts are mounted between two main rib plates and corresponding lateral protective plates on the rear portions of the hydraulic support bases. Limiting device bodies are arranged on the inner sides of the two main rib plates respectively. Each limiting device body comprises a U-shaped flitch plate fixed on the inner side of each main rib plate, a rear connecting rod hinge hole formed in each main rib plate is disposed in an upper opening of the corresponding U-shaped flitch plate, a guiding limiting plate is fixed on the face of each U-shaped flitch plate, two insert holes and two limiting bolts are formed in and arranged at the positions, corresponding to the upper opening of the corresponding U-shaped flitch plate, of each of two sides of a rear gap bridge of the hydraulic support bases in a spaced manner, the lower ends of the limiting bolts extend into the upper openings of the U-shaped flitch plates and fit in annular clamp grooves in thickness and width, limiting pin holes are formed in the top of the limiting bolts, and connecting lug plates are fixed at the positions, corresponding to the limiting pin holes, of the rear gap bridge of the hydraulic support bases. The limiting device has the advantage that the problem that the limiting device damaged by squeezing of adjacent hydraulic support bottom adjusting mechanisms is solved.