The product is developed for users who have no re baking conditions before use or are unwilling to re bake and directly use acid stainless steel electrodes. The addition of appropriate fluoride and arc stabilizer is very beneficial to improve the arc stability and porosity sensitivity; the addition of marble in the coating can improve the anti porosity sensitivity of the weld and the vertical welding process performance; dewatering treatment of rutile and feldspar is conducive to improving the anti porosity sensitivity of weld. After 3 to 6 days and 50%~80% humidity accelerated moisture absorption, the developed electrode has better anti porosity sensitivity than the conventional acid stainless steel electrode. By comparing the arc stability, slag removal, arc re ignition, spatter rate, electrode coating anti redness, cracking and vertical welding process of the two kinds of electrodes, the welding process performance of the electrode without re drying is equivalent to that of the electrode requiring re drying. Through the contrast test of physical and chemical properties, the mechanical properties are close, the chemical composition is equivalent, and the results are excellent, which fully meet the requirements of standards and users.