Biological　experiments　are　an　important　means　of　studying　calcium　transients　in　myocardial　cells,　but　it　is　difficult　to　conduct　simultaneous　interactions　between　various　components　within　the　cell.　This　article　constructs　a　geometric　model　of　the　occurrence　space　of　atrial　sarcoplasmic　reticulum　calcium　transient,　and　constructs　a　dynamic　model　based　on　the　physiological　mechanism　of　sarcoplasmic　reticulum　calcium　transient.　By　using　the　constructed　dynamic　model　for　the　numerical　calculation　of　sarcoplasmic　reticulum　calcium　transient　in　atrial　muscle,　most　of　the　results　are　in　line　with　biological　experimental　results.　In　addition,　this　numerical　model　can　also　simulate　the　morphology　of　various　sarcoplasmic　reticulum　calcium　transients　in　myocardial　cells　by　optimizing　the　dynamic　model　of　sarcoplasmic　reticulum　calcium　transients　and　adjusting　parameters.　©　2024　SPIE.