The present invention discloses a micro-objective lens, comprising the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, the sixth lens group, the seventh lens group, the eighth lens group, the ninth lens group and the tenth lens group with optical axis arranged in a sequence from the left to the right; the focal length of the first lens group is negative; the second lens group belongs to doublet, in which the focal length of the first and second lens is positive and negative respectively; the focal length of the third lens group is positive; the fourth and fifth lens groups belongs to doublets, in which the focal length of the first and second lens in each group is negative and positive respectively; the focal length of the sixth lens group is positive; the focal length of the seventh and eighth lens groups is negative; the focal length of the ninth and tenth lens groups is positive. The present invention also discloses a high-resolution broadband imaging system with aforesaid micro-objective lens.