The invention provides a lotus seedpod type membrane assembly comprising an outflow dry pipe, a liquid collecting cap, liquid collecting pipes and membrane units, wherein the outflow dry pipe and the liquid collecting cap are in fluid sealing connection in a detachable manner; the liquid collecting cap and the liquid collecting pipes are in fluid sealing connection in a detachable manner; the liquid collecting pipes and the membrane units are in fluid sealing connection in a detachable manner; the membrane units each includes a membrane unit outflow pipe, a liquid collecting head and membrane wires, wherein the membrane unit outflow pipes and the liquid collecting heads are in fluid sealing connection in a detachable manner, and the membrane wires and the liquid collecting heads are in integrated fixed connection. The membrane assembly is characterized in that the liquid collecting cap has a symmetrically-designed round or polygonal shape, and the membrane units are connected to the liquid collecting cap through the liquid collecting pipes in a symmetrical manner.