A multi-mode wideband antenna based on multi-mode resonator is proposed with stable radiation pattern, which is composed of two metal radiators, two parasitic resonators, two shorted patches fed by the U-shaped feedline and a box-shaped reflector. A prototype of the proposed antenna is designed, fabricated and tested. Measured results show that the antenna achieves an impedance bandwidth of 37.5% (0.67-0.98 GHz) for |S11|<-15 dB, a half-power beam width (HPBW) of 67.5±2.4 degree at H-plane (horizontal plane) and a gain of 7.9±0.4 dBi. Furthermore, the XPD is more than 15 dB at 0° and at least 11.2 dB within ±60°at H-plane, respectively. The proposed antenna can be used in modern communication system for LTE700/GSM850/GSM900.