The invention provides a well logging characteristic curve reconstruction method of a gravel rock based on rock core scale well logging. The method comprises the following steps of dividing a core taking segment into a mudstone clamping thin layer sandstone segment, a gravel rock and mudstone interbedding segment and a gravel-rock thick layer segment; dividing the mudstone clamping thin layer sandstone segment, the gravel rock and mudstone interbedding segment and the gravel-rock thick layer segment on a well logging curve; comprehensive analyzing a characteristic of each well logging curve and searching characteristics of the above three segments on each curve; finding a sensitive curve reflecting different lithology of the three segments; carrying out baseline rotation on a special segment which is obviously inclined of a mudstone baseline in the sensitive curve; and based on special segment mudstone baseline rotation, carrying out reconstruction of a full well segment of the well logging characteristic curve. By using the well logging characteristic curve reconstruction method of the gravel rock based on rock core scale well logging, a problem that a measured curve can not represent a reservoir layer characteristic is solved; precision of gravel rock reservoir layer inversion is guaranteed and gravel rock reservoir layer inversion quality is increased.