We analyze 152 large confined flares (GOES class ≥M1.0 and ≤45◦ from disk center) during 2010−2019, and classify them into two types based on their different dynamic properties. “Type I” flares are atypical confined flares above the filaments, which are characterized by slipping motions of flare loops and ribbons and not associated with any eruption of a filament/flux rope. “Type II” flares are typical confined flares associated with the failed eruptions of the filaments/flux ropes, which can be explained by the classical 2D flare model. A total of 59 flares are “Type I” flares (about 40%) and 93 events are “Type II” flares (about 60%). There are significant differences in distributions of the total unsigned magnetic flux (ΦAR) of active regions (ARs) producing the two types of confined flares, with “Type I” confined flares from ARs with a larger ΦAR than “Type II”. We calculate the mean shear angle ΨHFED within the core of an AR prior to the flare onset, and find that it is slightly smaller for “Type I” flares than that for “Type II” events. The relative non-potentiality parameter ΨHFED/ΦAR has the best performance in distinguishing the two types of flares. About 73% of “Type I” confined flares have ΨHFED/ΦAR