Abstract: Analyzed in the essay is the relationship between continuous feeding by the horizontal spiral accumulator and the productivity in the HFW pipe manufacture process.As a result, it is identified that the critical step to ensure both welding quality and the productivity of the operation line is keeping continuous feed by the accumulator.And whether continuous feeding operation can be ensured is subjected to such parameters as strip butting time, coil length, fast-charging speed and running speed of the rolling mill, etc.Based on the above mentioned analysis, the calculation formula for related parameters is derived, being regarded as the theoretic basis for application to actual production activities.Finally, measures to ensure the accumulator continuous feeding are proposed.