The invention discloses a four-polarized antenna oscillator, a four-polarized antenna and a four-polarized multi-antenna array. The four-polarized antenna oscillator comprises four polarized oscillators, wherein the midpoints of the four polarized oscillators coincide with each other, the polarization direction of the first polarized oscillator is the horizontal direction, the polarization direction of the second polarized oscillator is perpendicular to the horizontal direction, an included angle formed between the polarization direction of the third polarized oscillator and the horizontal direction is 45 degrees, and an included angle formed between the polarization direction of the fourth polarized oscillator and the horizontal direction is minus 45 degrees. By integrating the four polarized oscillators with different polarization directions in one antenna oscillator, the width of the antenna is reduced, and the requirement for horizontal isolation between two columns of dual-polarized antennas is avoided. Therefore, no additional space requirement is put forward on the top surface of a base station so as to ensure smooth deployment of LTE and 4G networks.