The invention discloses a multi-row multifunctional inner curve rotor driven digital variable radial plunger pump. Based on a rotating inner curve rotor and an inner curve guide rail arranged on a returning pressing plate, a plunger roller assembly is driven to reciprocate, the volume of closed plunger cavities formed by plungers and plunger holes in a shell is periodically increased and decreasedalong with the reciprocating movement of the plungers, oil suction one-way valves, oil discharge one-way valves and high-speed digital switch valves are embedded in channels, communicated with all the plunger cavities, in the shell respectively to achieve the oil suction and discharge functions of the pump, and by actively controlling the switch-on and switch-off state and sequence of valve openings of the high-speed digital switch valves, the stable variable-displacement control adjustment of the pump according to an approximately linear variation rule from the maximum-displacement working condition to the zero-displacement working condition is achieved. The pump is suitable for low-speed working conditions, through the design of the multifunctional inner curve guide rail and the multi-row inner curve rotor, the large displacement is easily reached, and the problem is solved that the adjustment working conditions of the large displacement and variable displacement of current hydraulic pumps are difficultly achieved.