Abstract: In line with geological characteristics of "low pressure, law permeability and low content of oil and gas" of reservoir in Paleozoic group in Fuxian,Shanbei,and on the basis of investigation and analysis on the data from regional gcaology and testing technology,research on scale optimization and parameters of the multi-step acid fracturing and closed acidizing treatments for different layers has been made. It has deternlined the best implementation scale and parameters, and overall analysis for auxiliary testing techniques such as perforating,testing, gas teesting procedures, liquid flowout after fracturing, pay wne protection have been conducted for the purpose of making quitable testing approach for the exploration in Fuxian area.