Slowly declining structure of toilet cover base

The utility model discloses a toilet seat cover carriage descent control structure, relating to a toilet and aiming to solve the problems of big clearance between parts and easy loosening and swinging after times of use in the prior art. The toilet seat cover carriage descent control structure of the utility model comprises two sleeves fixed on the toilet and two descent control devices respectively arranged in the two sleeves. Each of the descent control devices includes a shaft sleeve and a shaft core inside the shaft sleeve; the shaft core is provided with a connecting part connected and arranged in the groove of a first link which is connected and arranged on the seat cover; one end of the shaft sleeve is embedded into the shaft sleeve, the beam barrel is provided with a convex-connection part connected and arranged in the groove of a second link which is connected and arranged on the seat cover; a gasket is arranged between the shaft core and the first link and a lantern ring is arranged between the conv