The invention provides a predicting method for a recoverable reserve, a device, electronic equipment and a storage medium, and relates to the technical field of oil and gas exploration. The predictingmethod for the recoverable reserve comprises the steps that a simulation flowing bottomhole pressure of a to-be-predicted shale gas well is obtained based on the relation curve of an arithmetic square root that a simulation pressure difference of the to-be-predicted shale gas well and daily output of the to-be-predicted shale gas well multiply by the time, wherein the simulation pressure difference is the difference of a simulation formation pressure and the simulation flowing bottomhole pressure; based on the simulation flowing bottomhole pressure and the pre-stored daily output of the to-be-predicted shale gas well, accumulated output when a flowing bottomhole pressure reaches actual output pressure of the shale gas well is obtained and serves as predicted stable-production-period accumulated output; prediction decline-period accumulated output is obtained based on a first specific value of adsorbed gas to free gas of a shale gas layer, a second specific value of stable-production-period accumulated output to a decline-period accumulated output, an equal relation of the first specific value and the second specific value, as well as the predicted stable-production-period accumulated output; and the sum of the predicted stable-production-period accumulated output and the prediction decline-period accumulated output serves as the predicted recoverable reserve. The predicting method can well predict the recoverable reserve.