Production method for improving argon production yield

The invention discloses a production method for increasing argon production yield, which comprises the following steps: reducing the process argon yield to be within 32-36 times of the argon fraction extraction amount, gradually reducing the argon fraction value by 6-8% Ar, reasonably matching the lower tower liquid air purity with the heat exchange temperature difference of a crude argon tower condenser, keeping the lower tower liquid air purity by 35-38% O2, turning down the opening of a crude argon tower liquid air reflux valve, and controlling the argon production yield to be higher than that of the crude argon tower. The empty volume of the backflow liquid is 1t; the total amount of liquid air in a crude argon tower is 5% when the process argon temperature is 1t; when the temperature is-185.5 DEG C, an expansion air bypass waste nitrogen pipeline valve is gradually opened, and the temperature lt is kept according to the opening standard; 185.5 DEG C below zero; the oxygen content of a crude argon I tower