The invention provides a method for stabilizing pressure of a gas collection pipe of a coke oven. The method comprises the following steps: additionally arranging one set of turning plate automatic adjusting system in a coal gas pipeline in front of an inlet of a coal gas air blower, and forming interlocking between the turning plate automatic adjusting system and a suction force control point in front of the air blower; calibrating a reasonable suction force range in front of a primary cooler to be 1500+/-200Pa; calibrating a reasonable working range of a turning plate adjustment in front of the air blower to be 30 percent to 70 percent; adjusting a rotary speed of a hydraulic coupler of the air blower and the turning plate adjustment to be automatic and controlling the opening degree of the turning plate to be 30 percent to 70 percent; manually adjusting the rotary speed of the hydraulic coupler of the air blower according to changes of a coal gas generation amount; manually adjusting the number of turns for opening circulating pipe valves; finally, manually adjusting the opening degree of an inlet valve of the air blower. According to the method provided by the invention, the stability of a suction force in front of the primary cooler can be ensured, the percent of pass in a range of 1500+/-200Pa is 95 percent or above and the percent of pass in a range of 160+/-40Pa is 96 percent or above; damages to a furnace protection iron piece and equipment, caused by the fact that pressure in the gas collection pipe has great fluctuation, are extremely reduced, and loss of byproducts is avoided.