A communist state constitution is the supreme and fundamental law of a communist state. In Marxist–Leninist theory, a constitution is understood both as a juridical act that establishes the structure of the state and its legal order, and as the formal expression of the prevailing class system controlled by the ruling class. Communist constitutions codify the political and economic programme of the ruling communist party and are considered to hold supreme legal force, providing the foundation for all legislation and state activity. Unlike liberal constitutional systems, communist state constitutions reject the separation of powers and judicial review, vesting the unified powers of the state in a supreme state organ of power (SSOP). The constitution defines the structure and functioning of other state organs as an act of the SSOP’s self-organisation, not as an imposition upon it in accordance with the division of labour of state organs.
Communist constitutions share a broadly similar structure: a preamble outlining ideological goals; chapters on the political and economic system, often emphasising the leading role of the party, providing a normative framework for the transition to a communist society, public ownership and planned economic development; sections defining the organisation of state power, including the SSOP, its permanent organ, the supreme executive and administrative organ, the supreme judicial organ, the supreme procuratorial organ, and other state organs if needed; and chapters detailing citizens' rights and obligations. Rights are paired with corresponding obligations, reflecting the view that rights are not natural entitlements but contingent upon fulfilling social obligations. Legal systems operate under the principle of socialist law, which requires state organs, transmission belt mass organisations, and citizens to observe the constitution and laws. The procuracy typically supervises legality; constitutional enforcement is ordinarily vested in the SSOP or its permanent organ (with occasional specialised committees or courts).