The utility model discloses a separated type spherical belt wheel provided with grooves. The separated type spherical belt wheel provided with grooves comprises a wheel body (1), snap springs (2) and screw rods (3). The wheel body (1) of the separated type spherical belt wheel provided with the grooves is cylindrical; 4-6 rows of semispherical holes (B) distributed uniformly are formed around the wheel body (1); the semispherical holes (B) are communicated with one another through semicircular grooves (C); the wheel body (1) consists of two half parts; a motor shaft hole (F) is formed in the center of the wheel body (1); a key slot (E) is formed in the motor shaft hole (F); two screw rods (3) are respectively connected inside the two ends of the wheel body (1); the upper ends of the screw rods (3) are locked by the snap springs (2). The separated type spherical belt wheel provided with grooves, disclosed by the utility model, is applicable to driving of a heavily-loaded spherical steel wire core belt of an oil pumping unit of an oil field, high in driving efficiency and long in service life; a belt wheel can be replaced without using a wheel puller; the belt wheel can be mounted and dismounted by using an inner hexagonal spanner and a snap spring clamp, so the separated type spherical belt wheel is convenient to operate and capable of saving time, labor and electric power and relieving the labor strength of workers in the station.