The invention discloses an automatic yarn clamping device for spinning. The automatic yarn clamping device for spinning comprises a wharve and a spindle blade. The spindle blade is sleeved with a sleeve, a sliding bush, a blade, a blade protection base, a push plate and a steel collar plate. The sleeve is coaxially arranged on the spindle blade in a sleeved mode and is arranged at the upper end of the wharve in a press fitting mode. A protruding part is arranged at the end, away from the wharve, of the sleeve, and a groove is formed in the lower end of the protruding part. The blade is fixed to the spindle blade through the blade protection base and arranged on the upper end face of the protruding part of the sleeve in a press fitting mode. The sleeve is movably sleeved with the sliding bush. One end of the push plate is connected with the sliding bush, and the other end of the push plate is connected with the steel collar plate through an air cylinder. The push plate is connected with a driving device through a circuit and driven by the driving device to move vertically. The automatic yarn clamping device for spinning is simple in structure, convenient to operate, and fast and reliable in yarn clamping motion.