A novel microstrip bandpass filter with the folded dualmode resonator structure is designed. The cross coupling structure loaded at both sides of folded dualmode resonator of the filter is used to generate a pair of transmission zeros at the both ends of the pass band .The experimental results show that the filter has advantages of compact structure, small size, low loss and good rejection features outside of the pass band etc; the pass band of the filter is from 2.5 GHz to 4.8 GHz at the center frequency of 3.65 GHz, the maximum return loss surpasses -33.5 dB,and the minimum insertion loss is -0.18 dB. The measurement result is consistent with the software simulation result each other.