The invention relates to the technical field of diamond tool processing and welding, in particular to a diamond automatic welding frame, which includes a machine frame, a PLC controller, a heater, a cutter head rotating conveying module, a cutter head lifting module, a cutter head module, a knife Disc rotation module, cutter head thickness measurement module, solder sheet conveying module, mobile device and cutter head lifting module; the PLC controller, heater, cutter head rotating conveying module, cutter head lifting module, clip The cutter head module, the cutter head rotation module, the cutter head thickness measurement module, the solder sheet conveying module, the mobile device and the cutter head lifting module are erected on the frame; the frame is a diamond automatic welding frame support structure; The PLC controller is a welding frame control system. The present invention changes the traditional way of conveying the cutter head and the solder sheet by setting the cutter head rotary conveying module and the solder sheet conveying module, reduces the failure rate, reduces the use cost, and increases the accuracy and transmission efficiency.