<p>Multi-channel technology can effectively eliminate wireless interference. The algorithms proposed for multi-channel sensor networks usually assume that sufficient channels are available to enable interference-free parallel transmission. However, in practice, the number of usable channels is limited, making complete wireless interference elimination and parallel transmission challenging. To address this problem, this paper proposes a heuristic slot reuse algorithm that integrates the signal to interference plus noise ratio (SINR) model with multi-channel technology. The algorithm allocates consecutive slots to nodes in a top-down manner. When slot allocation fails due to unstatisfied SINR thresholds, a new channel is added and assign the slot. Simulation results demonstrate that our algorithm achieves concurrent transmission under limited channels, significantly optimizing scheduling length.</p>