Concrete slump measuring device

The utility model provides a concrete slump measuring device which comprises a testing mechanism, the testing mechanism comprises a slump cylinder, four first fixing blocks are evenly distributed on the outer wall of the bottom wall of the slump cylinder, a through hole is formed in each first fixing block, a tray is arranged below the slump cylinder, a fixing track corresponding to the through hole is arranged on the tray, and the fixing track is arranged on the bottom wall of the slump cylinder. A measuring device is arranged on one side of the slump cylinder and comprises a measuring rod, a shaft sleeve, a transverse rod and a second fixing block, a ruler is arranged in the second fixing block in a penetrating mode, and it is guaranteed that when the slump cylinder is lifted, the slump cylinder moves in the vertical direction and does not shake left and right to affect concrete slump measurement; the fixed rail is far away from the slump cylinder and cannot block concrete, the cross rod can be conveniently