Abstract: There are four basic metal transfer modes, globular droplet transfer, flux-wall guided transfer, explosive transfer and spray transfer for covered electrode.Photoelectrical oscillograph is traditionally employed to analyze arc voltage and welding current as two major electric parameters for the purpose of understanding the stability degree of a welding operation. Only the general characteristic of metal transfer can be qualitatively described and the quantitative analysis can' t be carried out. Those parameters, such as probability density distributions of arc voltage, welding current and the data of short-circuiting time t₁, burning time t₂,weighted burning time t₃, cycle time t_c, which are existed in four kinds of typical metal transfer modes and can be added up and analyzed by ANALYSATOR HANNOVER. Four typical metal transfer modes can be evaluated by analyzing above-mentioned parameters. The arc physical characteristic of different metal transfer modes can be accurately described. The statistical analysis of electric parameters, which are collected by ANALYSATOR HANNOVER, provide a new method to determine the metal transfer mode for the covered electrodes.