The invention discloses a filter plate stretchable high pressure plate-and-frame filter press. The filter plate stretchable high pressure plate-and-frame filter press comprises a first fixing plate, asecond fixing plate, a hydraulic press fixed on the second fixing plate, and a plurality of combined plate frames, wherein the first fixing plate and the second fixing plate are arranged oppositely,the plurality of combined plate frames are sequentially, movably and horizontally stacked between the first fixing plate and a stretching end of the hydraulic press through a plate frame support horizontal pipe, inner cavities of the various plate frames are sequentially connected in series and then communicated with a sludge injection port, each plate frame is provided with a stretchable filter plate capable of extruding and filtering water of a plate frame material, and the stretchable filter plates are respectively connected with an external vacuum device, an air blowing device and a hydraulic device through a plurality of pipelines. The filter plate stretchable high pressure plate-and-frame filter press has the advantages of simple structure, low manufacturing cost, easiness in operation and maintenance, easiness in installation and dismounting of the filter plate and a filter cloth, convenience in sludge discharge, low energy consumption, adjustable sludge handling capacity and the like, and can be widely popularized and applied.