The invention discloses a bearing parameter optimizing method based on contact deformation amount and load distribution of a hollow cylindrical roller. The bearing parameter optimizing method includes: S1, according to a working condition, primarily calculating design parameters of the size of an inner ring and an outer ring of a hollow cylindrical roller bearing, the number of rolling bodies, hollowness of the rolling bodies and radial internal clearance of the bearing; S2, calculating the load distribution of the hollow cylindrical roller bearing; S3, comparing a calculation result of the load distribution of the hollow cylindrical roller bearing obtained from the S1 and the S2 with an allowable value of load of the rolling bodies, analyzing, and optimizing the bearing parameters inconsistent with regulations. The bearing parameter optimizing method has the advantages that the parameters inconsistent with the regulations can be further optimized by calculating and measuring various parameters of the bearing, and production and design of the bearing can be ensured to meet with national standards.