In order to improve the security and economy of information transmission, this paper proposes a controllable dense coding scheme using 4-particle cluster states as quantum channels, and a 5×2×2×2-dimensional asymmetric coding channel. In this scheme, the control party is changed from one to two, and the safety is higher. The asymmetric encoding method can transmit more information. The operation of the control side is one-dimensional orthogonal base measurement and projection measurement, which is easier to realize. The selected quantum channel is a 4-particle cluster state, which has continuous entanglement and maximum connectivity compared with the GHZ state and W state, and is more suitable for quantum channel.