In the present study, several heterogeneous distributed composite microstructured surfaces (HDCMs) with different geometry parameters were prepared. The effect of the widths of the composite microstructured region, the widths of the smooth channels, the pitch of the micro-pin-fins, and the porosity of the surfaces on the pool boiling performance in HFE-7100 was examined under different liquid subcoolings. During the experiments, the three-phase contact lines of bubbles can be restricted by composite microstructured regions. Thus, reasonable geometry parameters can further enhance the liquid supply, promoting pool boiling heat transfer performance. The maximum critical heat flux of the HDCM is 14.1 % higher than that of the uniformly distributed composite microstructured surface (UDCM). Considering the effects of subcooled Jakob number (Jasub), composite microstructured region density number (SD), capillary resistance number (CR), and porosity (φ) on the critical heat flux (CHF) of HDCMs, an empirical correlation predicted the CHF for DCMs with different geometry parameters was proposed. The prediction results meet well with the experimental data, with an error within ±15 %.