The invention discloses a modular power integrated unit in the technical field of cold and heat supply. The unit comprises an efficient cold and heat supply system, wherein the efficient cold and heatsupply system comprises a hot and cold source, a transmission and distribution system, a tail end system and a transmission and distribution pipeline, the transmission and distribution system comprises a modular power integrated unit body, the modular power integrated unit body is in electric output connection to a transmission and distribution function unit, an auxiliary heating and heat loss balancing function unit and an automatic control unit, the hot and cold source is an air source heat pump, the air source heat pump is installed on the roof of a building, an application range is wide,the modular power integrated unit is not limited by regions, and is suitable for newly-built and rebuilt residential communities, the problem that an air source heat pump in a region is poor in heating effect is effectively solved, construction is convenient and flexible, different numbers of modules can be arranged for different single building scales, influence on the community environment spaceis small, only a single module can be cut off and maintained in a maintaining process, and heating of all buildings cannot be affected.