Abstract: According to actual requirements of personnel position system of coal mine underground,the paper studied collision problem of multi-sensor nodes of asynchronous status of wireless sensor networks under low-power.It gave design and implementation of first listening later sending algorithm,time slice scheduling algorithm and consecutive misreading filter algorithm by single-chip microcomputer(programming.) The experiment result showed that the consecutive misreading filter algorithm was simple and(practical,) and could solve the collision problem efficiently under low-power.