The embodiment of the invention relates to the technical field of wireless communication, in particular to a method, a system and equipment for transmitting downlink dynamic scheduling information, which are used for user equipment to judge whether a data packet sent in a common search space is a last data packet or not. The method for transmitting the downlink dynamic scheduling information, which is provided by the embodiment of the invention, comprises the following steps that: the user equipment receives a downlink dynamic scheduling signaling through the common search space; and the user equipment judges whether the received downlink dynamic scheduling signaling is a last downlink dynamic scheduling signaling of a corresponding carrier wave in a current feedback window or not according to transmission information. The user equipment can judge whether the received downlink dynamic scheduling signaling is the last downlink dynamic scheduling signaling of the corresponding carrier wave in the current feedback window or not according to the transmission information, therefore, the user equipment can know whether the data packet sent in the common search space is the last data packet or not.