A kind of minisize fluid control device,Including stack setting inlet plate,Resonance plate and piezoelectric actuator,Wherein inlet plate have an at least air inlet,One of one confluence chamber of at least one confluence round and composition circular recess； Resonance plate has hollow bore； Piezoelectric actuator have suspension board,Outline border and piezoelectric ceramic plate； Wherein suspension board has circular protrusions one of corresponding with round recess portion,By changing the working characteristics relationship ratio of the formed transmission and air pressure of corresponding relationship between circular recess and circular protrusions,And then promoted its transmission pneumatic flow,Improve minisize fluid control device performance.一種微型流體控制裝置，包括堆疊設置之進氣板、共振片以及壓電致動器，其中進氣板具有至少一進氣孔、至少一匯流排孔及構成一匯流腔室之一圓形凹部；共振片具有中空孔洞；壓電致動器具有懸浮板、外框及壓電陶瓷板；其中懸浮板具有與圓型凹部對應之一圓形凸部，藉由改變圓形凹部與圓形凸部之間的對應關係所形成傳輸氣壓之工作特性關係比值，進而提升其傳輸的氣壓流量、改善微型流體控制裝置性能。
