The invention belongs to the field of oil fume exhaust ventilators, and particularly relates to an adsorption type oil collection groove and an oil fume exhaust ventilator thereof. The adsorption typeoil collection groove comprises a rectangular-parallelepiped-like oil collection groove, wherein both ends of the inner cavity of the oil collection groove are respectively provided with a snapping connection type cleaning head, and an adsorption structure for adsorbing oil stains is arranged between the two snapping connection type cleaning heads. The oil fume exhaust ventilator having the adsorption type oil collection groove comprises a side suction type oil fume exhaust ventilator, wherein the oil collection groove below the side suction type oil fume exhaust ventilator is the adsorptiontype oil collection groove, the adsorption type oil collection groove comprises a rectangular-parallelepiped-like oil collection groove, both ends of the inner cavity of the oil collection groove arerespectively provided with a snapping connection type cleaning head, and an adsorption structure for adsorbing oil stains is arranged between the two snapping connection type cleaning heads. Accordingto the present invention, through the design, the oil stains inside the oil collection groove can be conveniently and rapidly cleaned so as to easily collect the oil stains and reduce the labor intensity.