The invention belongs to the field of machinery, and particularly relates to a double-acting rotor speed cross pump. The cross pump comprises a pump body, wherein a main shaft is arranged in the pumpbody, and a first gear, a second gear, a first elliptical gear, a third gear and a fourth gear are arranged on the main shaft in a sleeving mode; a first transmission shaft and a second transmission shaft are rotationally connected in the pump body, a fifth gear, a second elliptical gear and a sixth gear are fixedly arranged at the first transmission shaft in a sleeving mode, and a seventh gear, athird elliptical gear and an eighth gear are fixedly arranged at the second transmission shaft in a sleeving mode; and the upper end of the main shaft is provided with a first rotor in transmission connection with the first gear and a second rotor in transmission connection with the second gear in a sleeved mode, and the lower end of the main shaft is provided with a third rotor in transmission connection with the third gear and a fourth rotor in transmission connection with the fourth gear in a sleeved mode. Compared with the prior art, a pair of the two rotors in the double-acting rotor speed cross pump form a fork-shaped structure, the opening and closing of the rotors are realized by means of the elliptical gears, the friction between the rotors is reduced, the service life of the pump is prolonged, and the sealing effect is better.