The invention discloses a method for welding pushing rams of a coke pusher used in a coke oven traveling machine, which comprises the following steps: baking of welding electrodes; assembly of pushing rams; groove machining: roughly polishing the groove by a flame cutting method and finely polishing the groove by a polishing machine to ensure that the groove is smooth in surface without burrs and complete in penetration; preheating treatment: using a low-temperature annealing preheating treatment method for eliminating the internal stress of the pushing rams, improving the welding properties of the pushing rams and preventing the pushing rams from cracking; positioned welding: carrying out electric welding to two sides of the groove by a manual electric arc welding method, so that the two pushing rams are fixedly connected, and the sidewise bending value and the upwarp value conform to the design requirements; and symmetry welding: simultaneously carrying out symmetry welding from two sides of the groove by a manual electric arc welding method, so that the sidewise bending value and the upwarp value conform to the design requirements. By adopting the method, the welding deformation can be effectively reduced, the cracks and other welding defects of the pushing rams can be avoided, and the welding quality is good.