The invention discloses a cold-proof double swing and a processing process thereof. The cold-proof double swing comprises a bearing beam and two single swings. The single swings are hung on the bearing beam, and the bearing beam comprises, by mass, 0.01-0.02% of Cr, 0.7-0.9% of Al, 1-3% OF Si, 0.05-0.08% of O, 0.11-0.12% of C, 1-3% of Si, 0.2-0.4% of Co, 0.0025-0.0030% of P, 0.002-0.003% of S, 0.1-0.3% of Mn, 0.4-0.5% of Ti, 0.002-0.004% of V, 0.1-0.3% of Cu, 0.001-0.003% of Nb, 0.04-0.05% of B, 0.01-0.02% of Mo, 0.2-0.4% of composite rare earth and the balance Fe and inevitable impurities, wherein the sum of mass percents of all components is 100%. The processing process is simple and feasible, the double wing is excellent in cold resistance, the service life can be prolonged, and cost reduction is realized.