The invention provides a multifunctional ball training aiding device which comprises two outer side aluminum plates (16), a hollow supporting base (17), two first inner side aluminum plates (19), two second inner side aluminum plates (20), a synchronous belt (13), a synchronous belt wheel (12), an air wheel (11), a multifunctional pulley (21), two big ball collecting arms (23), two big ball collecting arm driving motors (4), two first ball collecting gears (24), two second ball collecting gears (25), two ball collecting driving motors (2), a thick connecting rod (10), a front end roller (1), two crank driving motors (7), a crank connecting piece (6), two first cranks (26), two second cranks (27), two second big gears (38), a small gear (29), two large ball serving arms (5), two fan-shaped connecting pieces (30) and two right-angled L-shaped frames (31). The multifunctional ball training aiding device can achieve movement, ball collection and ball serving in a site and brings convenience to training aiding of athletes.