Objective: The paper is to standardize the inpatient diagnosis and treatment process of percutaneous coronary intervention (PCI) and improve hospital management efficiency. Methods: A total of 380 patients grouped in FM19 from Jan. 1st 2021 to Dec. 31st 2021 from a first-class hospital in Beijing were analyzed. Mann-whitney U test, one-way ANOVA, multiple linear regression and other methods were used to analyze the factors influencing first page of inpatient medical records and total inpatient expenditure. Results: The per capita cost of 377 effective PCI patients is 46318.21 Yuan pairing with the quota of FM19 which is 59483 Yuan, and the difference value balance is 13184.66 Yuan. Average length of stay is 6.16. Proportion of drugs, operation and treatments are factors which do not have significance of difference value (P>0.05). The primary influencing factor is proportion of medical consumables (P<0.001) . Patients' private expenses and length of stay have negative effect on difference value balance (P<0.001) . Conclusion: Managing the cost of medical consumables is an effective measure for medical institutions to realize the balance of patients in PCI group. Standardizing the hospitalization process of PCI, establishing an effective clinical path, and controlling the use of private projects are important means.