A method for transmitting a physical uplink control signal in a time division duplex system, wherein the uplink control signal is more than 2 bits. The method comprises the following steps of: a base station distributing a plurality of uplink channel code resources of a physical uplink control channel (PUCCH) for a user equipment, and making an agreement with the user equipment to transmit different contents represented by the uplink control signal using different uplink channel code resources; the user equipment selecting one or more uplink channel code resources from the distributed uplink channel code resources according to the content of the uplink control signal to be transmitted, and transmitting the uplink control signal on the physical uplink control channel.