A garbage bin with a cover capable of being fixedly opened, comprises a bin body and a movably opened/closed cover mounted on the bin body, wherein a support is arranged at one end of the cover connected to the bin body, a locking member capable of protruding from the support is movably arranged in the support, a bin shoulder is arranged on the bin body, the bin shoulder is provided with a through hole for the support to penetrate through in a matching manner, the locking member is snap-fitted with the bin shoulder, a toggle rod protruding from the support is convexly arranged at one side of the locking member facing the center of the bin body, and a spacing hole for the toggle rod to penetrate through in a matching and receiving manner is arranged at the front side of the support.