A door closing sequence controller for controlling a closing sequence between a leading panel having a first door closer and a trailing panel having a second door closer, the door closing sequence controller comprises: a first actuator mechanism connectable with the first door closer of the leading panel, wherein the first actuator mechanism comprises a tube; a second actuator mechanism connectable with the second door closer of the trailing panel, wherein the second actuator comprises a rod movably inserted into a second end of the tube; a fixing base disposed between the first actuator mechanism and the second actuator mechanism; a movable base movably disposed at the fixing base, the movable base comprising an accommodating space, wherein the rod penetrates the accommodating space of the movable base; a locking mechanism movably disposed in the accommodating space of the movable base, wherein the locking mechanism remains clamping the second actuator mechanism until the first actuator mechanism interacts with the locking mechanism, such that the locking mechanism can release the second actuator mechanism from clamping; wherein the first actuator mechanism comprises a first sliding block connectable with the first door closer of the leading panel, and the tube is driven by the first sliding block, and wherein the second actuator mechanism comprises a second sliding block connectable with the second door closer of the trailing panel, and the rod is linked to the second sliding block, characterized by a pair of rollers pivotally disposed at the accommodating space of the movable base, the locking mechanism comprises a pair of locking elements located between each of the rollers, the rod penetrates between each of the locking elements, and the second end of the tube is located in the accommodating space of the movable base and may contact against each of the locking elements; and a blocking pin for disabling the closing sequence control of the door closing sequence controller, said blocking pin being configured to be selectively disposed into the accommodating space of the movable base to contact against the locking mechanism and prevent the locking mechanism from moving relative to the movable base to thereby disengage the clamping state between the locking elements and the rod. a first actuator mechanism connectable with the first door closer of the leading panel, wherein the first actuator mechanism comprises a tube; a second actuator mechanism connectable with the second door closer of the trailing panel, wherein the second actuator comprises a rod movably inserted into a second end of the tube; a fixing base disposed between the first actuator mechanism and the second actuator mechanism; a movable base movably disposed at the fixing base, the movable base comprising an accommodating space, wherein the rod penetrates the accommodating space of the movable base; a locking mechanism movably disposed in the accommodating space of the movable base, wherein the locking mechanism remains clamping the second actuator mechanism until the first actuator mechanism interacts with the locking mechanism, such that the locking mechanism can release the second actuator mechanism from clamping; wherein the first actuator mechanism comprises a first sliding block connectable with the first door closer of the leading panel, and the tube is driven by the first sliding block, and wherein the second actuator mechanism comprises a second sliding block connectable with the second door closer of the trailing panel, and the rod is linked to the second sliding block, characterized by a pair of rollers pivotally disposed at the accommodating space of the movable base, the locking mechanism comprises a pair of locking elements located between each of the rollers, the rod penetrates between each of the locking elements, and the second end of the tube is located in the accommodating space of the movable base and may contact against each of the locking elements; and a blocking pin for disabling the closing sequence control of the door closing sequence controller, said blocking pin being configured to be selectively disposed into the accommodating space of the movable base to contact against the locking mechanism and prevent the locking mechanism from moving relative to the movable base to thereby disengage the clamping state between the locking elements and the rod.