A dynamic (t,n)-threshold secret sharing scheme based on one-way function is proposed in this paper. It has the following properties: (1) The dealer can renew system secrets without renewing the shadows of the participants; (2) When some participants's shadows are revealed, they can be renewed without any effect on the others; (3) A new shadow can be generated for a new participant without any effect on the others; (4) The shadows can be reused for many times; (5) Only n+1 parameters should be public (When a cheater could be checked out,it should be opened 2n+1 parameters.);(6)The system secret can be recovered with a parallel process.