With　the　continuous　development　of　the　5th　Generation　Mobile　Communication　Technology　(5G),　various　forms　and　demands　of　the　Internet　of　Things　(IoT)　business　have　emerged.　There　are　high　requirements　about　the　latency　and　reliability　in　some　IoT　services,　especially　for　the　ultra　reliable　low　latency　Communication　(URLLC)　services　of　IoT.　One　important　factor　for　URLLC　is　time-frequency　resource　allocation.　In　this　paper,　a　joint　delay　and　channel　quality　based　proportional　fair　scheduling　(JDCPF)　algorithm　is　proposed,　which　considers　scheduling　delay　and　channel　conditions　to　calculate　scheduling　priorities　for　different　IoT　services　with　different　communication　requirements.　Moreover,　an　adjustment　factor　is　introduced　based　on　the　latency　sensitivity　of　different　services.　According　to　the　provided　simulation　results,　the　proposed　JDCPF　algorithm　effectively　could　help　to　reduce　the　scheduling　latency　for　latency-sensitive　services.