The invention relates to a microaccelerometer, in particular to an array type single-chip integrated microaccelerometer. The technical problems of large size of the conventional acceleration sensor, incapability of realizing the full scale output of the conventional accelerometer unit, high breakage rate of the root of a clamped beam and incapability of realizing the optimal configuration of a high-low-range accelerator are solved. The array type single-chip integrated microaccelerometer comprises a monocrystalline silicon material structural layer (2), and the structural layer (2) is divided into a left part and a right part. A first piezoresistive accelerometer unit (21) and a second piezoresistive accelerometer unit (22) are integrated on the upper and lower parts of the right part of the structural layer (2) respectively, and have different ranges. A complementary metal oxide semiconductor (CMOS) circuit for amplifying and filtering output signals of the first and second piezoresistive accelerometer units (21 and 22) is integrated on the left part of the structural layer (2). Accelerometer array units and a signal processing circuit are integrated on the same chip, so that the microaccelerometer is miniaturized and integrated.