The utility model relates to a small-sized fixed ice-melting valve group which is characterized by consisting of three phase valve group units that are stacked, wherein all the phase valve group units are interconnected through insulators, a valve group unit and a base seat are connected through insulators, the left sides and right sides of all the phase valve groups are connected respectively through left electric conduction bars and right electric conduction bars, the left sides and right sides of all the phase valve groups are also connected with a left pulse electric cable trough and a right electric cable trough, and a left pulse electric cable support rack and a right pulse electric cable support rack are arranged among the pulse electric cable troughs and the base seat. The small-sized fixed ice-melting valve group is connected with an external ice-melting device through a left wire outlet copper bar, a right wire outlet copper bar and a wire inlet copper bar. All the valve group units consist of positive direction bridge arm valve groups, negative direction bridge arm valve groups and frame units. A positive direction bridge arm pulse electric cable and a negative direction bridge arm pulse electric cable are mounted on each bridge arm. Each valve group unit consists of a thyristor unit, a capacitance-resistance unit, a BOD protection unit, an electromagnetic trigger unit and a breakdown detection unit. A laminated structure is adopted for each valve group layer, all valve groups are compact in structure, and reasonable layout is achieved.