The application provides a method, device, equipment and medium for improving expression base expression capability, the method comprising: extracting initial semantic parameters of each frame of three-dimensional reconstruction data based on an initial expression parameterization model, and generating an initial parameterization result by driving a preset
face model through a first expression base corresponding to the initial semantic parameters; comparing the initial parameterization result under each first expression base with the three-dimensional reconstruction data to determine whether the initial parameterization result and the three-dimensional reconstruction data match; if not, generating expression residual data according to error information of the initial parameterization result and the three-dimensional reconstruction data; adjusting the initial expression parameterization model using the expression residual data to obtain an adjusted second parameterization model, and driving the
face model through a second expression base determined by the second parameterization model to generate a second parameterization result matching the three-dimensional reconstruction data. The application does not need manual input of
external data, thereby improving efficiency.