Many pyrazole derivatives have good bioactivity.In this paper, five new pyrazolylacyloxylalkylphosphonate derivatives have been synthesized by condensation of 4chloro1,3bismethylpyrazole5carboxlic acid with relative αhydroxyalkylphosphonates. All compounds synthesized are confirmed by 1H NMR,IR and MS.The synthesis of key intermediate pyrazole carboxlic acid has been studied.