The invention discloses a gas-liquid two-phase flow uniform distribution device, which mainly comprises a main distributor pipe, a hydrocyclone, a rectifier, critical nozzles and branch distributor pipes, wherein the hydrocyclone and the rectifier are sequentially arranged in the main distributor pipe; the critical nozzles are arranged on the wall of the main distributor pipe at the downstream ofthe rectifier; and the rear part of each critical nozzle is connected with a branch distributor pipe; gas-liquid two-phase flow is subjected to the action of the hydrocyclone and the rectifier, so the unsymmetrical flow patterns, such as stratified flow, wave flow and incomplete annular flow are rectified into an annular flow pattern that the thickness of the liquid film is uniformly distributed,which ensures that branch pipes at the downstream have an equal chance to contact the gas-liquid phase; the gas-liquid two-phase mixture in the critical flow nozzles is accelerated to be in the stateof critical flow; and the changes of parameters such as downstream pressure and the like are not delivered to the upstream, so the defect of the phase separation caused by the inconsistent resistancecharacteristics of the branch pipes at the downstream is overcome and the uniform distribution is realized. Compared with the prior art, the gas-liquid two-phase flow uniform distribution device is not affected by the fluctuation of the downstream parameters of the branch pipes of the distributor, does not need human intervention, can carry out self-adaptive adjustment, and has the advantages of small volume, compact structure, no moving parts, no maintenance, good environmental adaptability.