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As a new material, phase change energy storage materials have irreplaceable advantages and application value in building energy conservation and ecological sustainability. The commonly used solid and liquid phase change materials, due to the problem of easy leakage of solid and liquid phase change materials to a certain extent, restrict the development and application of phase change composites. Aiming at the low temperature solid liquid phase change material encapsulation technology, this paper introduces the low temperature phase change latent heat storage material and its phase transformation in packaging technology research status quo. The porous mineral adsorption phase change material, such as diatomite, expanded vermiculite and expanded perlite, and porous carbon based phase change composites based on expanded graphite were given priority to, as well as the preparation of aerogel phase change composite material technology. The load capacity, thermal performance and thermal conductivity of phase change composites are introduced. On this basis, the future research direction of solid and liquid phase variable composites is proposed, in order to provide some reference for the application and promotion of solid and liquid phase variable composites. [ABSTRACT FROM AUTHOR]