Abstract: For the array antenna feed network is complicated, a 24 GHz microstrip antenna array with novel series-and-parallel-fed is designed and theoretical research and simulation test is conducted in this paper. The proposed microstrip antenna array is fed by a novel series-parallel feeding network. Chebyshev distribution method is adopted by the antenna sub- array and the feed network and effectively reducing the sidelobe level. Simultaneously, the feed network is connected to the antenna directly achieving the purpose of miniaturization and effectively reducing the loss of the feed network. The simulation results show that the antenna array has a gain of 21.7 dBi. The side-lobe level of the pattern at the center frequency 24.1 GHz is -20.3 dB and -26.2 dB at E and H plane respectively. The antenna array is compact, reliable and can be used in the 24 GHz automotive anti-collision radar.