Adsorption type clamp facilitating 3D printing

The utility model belongs to the technical field of 3D printing, and particularly relates to an adsorption type clamp convenient for 3D printing, which comprises a printer rack, a groove is formed in the middle of the upper end of the printer rack, an electromagnet is mounted in the groove, limiting grooves are formed in the two sides of the upper end of the printer rack, limiting blocks slide in the two limiting grooves, and the upper end of the printer rack is fixedly connected with the printer rack. And fixing blocks are installed on the two limiting blocks correspondingly, adjusting assemblies are arranged in the two fixing blocks correspondingly, and a positioning assembly is arranged in the printer rack. Through the arrangement of the positioning assembly, the clamping range can be adjusted according to the length of a metal piece, the clamping stability is improved, the problems that printing is affected due to the fact that a clamp is not tightly clamped, and the printing precision is affected due to