With　the　development　of　location-based　services　based　on　smart　terminals　and　positioning　technologies,　location　forgery　and　privacy　leakage　become　an　important　issue,　making　it　difficult　for　the　existing　methods　of　proof　of　location　to　guarantee　the　accuracy,　authenticity　and　privacy　of　user　trajectory　information.　By　using　the　decentralized,　non-tamperable　and　traceable　characteristics　of　blockchain　and　combining　with　zero-knowledge　proof　method,　this　paper　proposes　a　personal　trajectory　verification　algorithm　to　provide　a　solution　to　solve　the　limitation　of　traditional　location　proof　method　for　trajectory　verification　problems.　©　2021　IEEE.