Needle machine with needles convenient to replace

The utility model relates to the technical field of needling machines, in particular to a needling machine convenient to replace needles, which comprises a workbench, support columns are arranged on two sides of the top of the workbench, penetrating plates are arranged at the bottoms of the inner sides of the support columns, a bearing plate is arranged on the tops of the support columns, and a hydraulic cylinder is arranged at the bottom of the bearing plate. The output end of the hydraulic cylinder is fixedly connected with a clamping box, a mounting plate is arranged at the bottom of the clamping box, clamping plates are arranged on the two sides of the top of the mounting plate, the tops of the clamping plates penetrate through and extend into an inner cavity of the clamping box, and a bidirectional electric telescopic rod is arranged in the inner cavity of the clamping box. When a needle head needs to be replaced, the bidirectional electric telescopic rod is reset, the bidirectional electric telescopic r