The invention discloses a compact type directional array antenna. The compact type directional array antenna comprises a PCB, an antenna array and a feeding network on the front surface of the PCB, and a radio frequency signal floor on the back surface of the PCB, wherein the antenna array comprises 4n antenna array elements which are in central symmetry; each antenna array element is an E-shaped embedded feeding type patch antenna; the radio frequency signal input port of each antenna array element is correspondingly connected with each radio frequency signal output port of the feeding network; and a feeding connecting groove is formed in the radio frequency signal floor, and coaxial feeding is formed by the feeding connecting groove and the radio frequency signal input ports of the feeding network. Since that the antenna array is in central symmetry, and each antenna array element is the E-shaped embedded feeding type patch antenna, the array antenna can generate directional radio frequency signals by regulating the output power and phase of each radio frequency signal output port of the feeding network; and in addition, by taking full advantages of the inherit advantages of the patch antenna, the purpose of compactness and low profile is fulfilled, so that the actual requirement of a micro Doppler effect can be satisfied.