The invention relates to a hot pressure filtration process and equipment for deep dehydration of fine-grained coal suspension, and relates to the technical field of solid-liquid separation of suspension. This process and equipment integrate mechanical pressure filtration and thermal drying. Mechanical pressure filtration is first performed on multiple sets of diaphragm filter plates—the drying plate unit, and a large amount of filtrate is discharged. The solid material forms a filter cake in the filter chamber, and then the drying plate Heating, pressurizing the diaphragm in the diaphragm filter plate at the same time, making the filter plate stick to the drying plate for hot pressure filtration, evaporating the capillary water into steam, and using the driving force of the steam itself to dehydrate, and at the same time to clean the drainage channel Vacuumize to speed up the dehydration. After a few minutes, the filter cake has been deeply dehydrated, then stop heating, pressurize, vacuumize, and discharge the solid materials. The membrane filter plate of this equipment - the drying plate unit, the drying plate is placed between the two membrane filter plates, so that the pressure filtration and drying are integrated into one equipment, and the equipment adopts the upper feeding or upper multi-channel feeding structure. The invention has the advantages of saving investment, occupying less land, saving energy, high production efficiency and low cost.