A microfluidic pump comprises at least one microfluidic sub-pump. The microfluidic sub-pump comprises: a liquid accommodating cavity (1), wherein at least one side wall of the liquid accommodating cavity (1) is a piezoelectric ceramic piece (2), and the piezoelectric ceramic piece (2) vibrates to cause the liquid accommodating cavity (1) to be in a state of contraction or expansion; a liquid inflow channel (3), communicating with the liquid accommodating cavity (1) via a first check valve (4); and a liquid outflow channel (5), communicating with the liquid accommodating cavity (1) via a second check valve (6). When the liquid accommodating cavity (1) is in a state of expansion, the first check valve (4) is opened, the second check valve (6) is closed, and liquid flows from the first check valve (4) into the liquid accommodating cavity (1); and when the liquid accommodating cavity (1) is in a state of contraction, the first check valve (4) is closed, the second check valve (6) is opened, and the liquid in the liquid accommodating cavity (1) flows out of the second check valve (6).