In order to improve the defect of UWB-MIMO antenna, such as large size, insufficient port isolation and weak antiinterference ability, a miniaturized UWB-MIMO slot antenna with notch characteristics fed by coplanar waveguide (CPW) is proposed, which cutting the square radiation patch to broaden the bandwidth, by connecting the two antenna unit coplanar ground and adding fence shaped decoupling branches between the antenna units, the isolation of the antenna is improved. The antenna size is only 30 mm× 56 mm×0. 8 mm. In addition, a C-slot open resonator ring ( SSR) structure is etched on the square radiation patch to filter the interference of WLAN band signals (5. 15~ 5. 85 GHz) to the UWB system. The measured results of the antenna show that the working frequency band of the antenna is 2. 73~ 10. 71 GHz, the port isolation is less than-20 dB, and the envelope correlation coefficient ECC is less than 0. 01. It shows that the antenna is suitable for UWB-MIMO communication system.