The position analysis of parallel double crank mechanism is carried out

and its kinematic analysis is carried out by using the influence coefficient method

this mechanism is a fundamental part of the crank-group driving mechanism.The kinematics parameters of crank and frame connecting rod of crank-group driving mechanism

such as angular velocity

velocity and angular acceleration

acceleration are analyzed

a method for kinematics analysis of crank-group driving mechanism is obtained

a theoretical basis for the application of this mechanism is provided.