The invention relates to a connecting pile of a fence used for road and municipal engineering. The connecting pile comprises a pile plate a and a pile plate b, wherein the lower part of the inner endsurface of the pile plate a is provided with a supporting plate which horizontally extends in the width direction; the upper end surface of the supporting plate is vertical to the inner end surface ofthe pile plate a; the width direction of the inner end surface of the pile plate a is arranged in the middle position; a plurality of threaded holes a are arranged at intervals from top to bottom, and are positioned above the supporting plate; the pile plate b is provided with the plurality of bolts a, and the threaded rod ends of the bolts a penetrate through the inner end surface of the pile plate b to be correspondingly matched with the threaded holes a one by one; the lower end of the pile plate a is provided with a threaded connection part. The connecting pile is favorable for simplifying a making step in fence assembling and disassembling, the integral installing and disassembling efficiency of the fence can be improved, and the problem of excessive resource waste is reduced; in addition, the fence formed by connection is firm, safe and reliable and can be conveniently stored, transported and transferred after being disassembled. In addition, the connecting pile can be recycledand is also favorable for realizing the standardization and the recycling of a sunshade, and input cost can be greatly reduced.