Provided is a spacing device which is convenient and safe in use and flexible in operation and can efficiently space two adjacent wiring pile heads. The spacing device comprises a base plate and multiple sets of spacing mechanisms. The spacing mechanisms arranged on the base plate. Each spacing mechanism comprises a support bar, two sets of stop motion mechanisms and at least two sets of support springs. The support springs are arranged between the base plate and the support bars. The base plate comprises a locating slot and multiple through holes. Each through hole is an elliptical hole. Grooves are arranged between two adjacent through holes. The grooves longitudinally run through the base plate. Two ends of the grooves are T-shaped grooves. The middle parts of the grooves are square grooves. The T-shaped grooves and the square grooves are connected into an integrated body, and height of the groove bottoms of the T-shaped grooves is higher than that of the square grooves. Each stop motion mechanism comprises a retainer, a stop plate and at least one set of stop spring which is arranged between the retainer and the stop plate. The spacing device is convenient in use and flexible in operation.